diff --git a/crates/eureka-pipeline/src/lib.rs b/crates/eureka-pipeline/src/lib.rs
index e787545..f80caa6 100644
--- a/crates/eureka-pipeline/src/lib.rs
+++ b/crates/eureka-pipeline/src/lib.rs
@@ -784,9 +784,13 @@ value_types! {
         severity: FindingSeverity, claim: Line, invariants: Vec<Label>[8], locations: Vec<CodeLocation>[16],
         failure_scenario: Para, evidence: Vec<Evidence>[16], precedents: Vec<ForeignRef>[8], origin: FindingOrigin,
     }
+    /// A follow-up. `origin` is where the Persona turn that admitted it was
+    /// asked, as the organ derived it: a brief records the conversation whose
+    /// message started it. Absent on follow-ups no Persona turn admitted and
+    /// on briefs admitted before it existed.
     pub struct PipelineFollowUp {
         campaign: Slug, label: Label, source: PipelineRef, repo: OrgRepo, locations: Vec<CodeLocation>[16],
-        item: Line, why_it_can_wait: Line, owner: Short,
+        item: Line, why_it_can_wait: Line, owner: Short, origin: Option<MemoryOrigin> = absent,
     }
     /// The record of how a subject was closed and by what. `sequence` is per
     /// subject and set by the writer, `1` for the first, and it is the last
@@ -914,8 +918,9 @@ impl PipelineRef {
     }
 }
 
-/// Where a memory came from and whom she heard it from. The organ derives it
-/// from the batch of the turn that wrote the memory; the model never writes it.
+/// Where a Persona turn's batch came from and whom she heard it from: a
+/// memory's origin and a brief's. The organ derives it from the batch of the
+/// turn; the model never writes it.
 /// `about` names whom a memory concerns, this names the room and the voices.
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
 pub enum MemoryOrigin {
@@ -1598,6 +1603,7 @@ mod tests {
                 source: PipelineRef { kind: PipelineKind::Finding, id: id("finding", "cut-3a.s2.F4") },
                 repo: repo(), locations: vec![location()], item: "Per-kind admission rules.".into(),
                 why_it_can_wait: "The organ owns admission.".into(), owner: s("Hands"),
+                origin: None,
             }), format!("{CAMPAIGN}:follow_up:FU-4")),
             (D::Resolution(PipelineResolution {
                 subject: PipelineRef { kind: PipelineKind::Question, id: id("question", "Q1") }, sequence: 1,
@@ -3604,6 +3610,30 @@ mod tests {
         Ok(())
     }
 
+    #[test]
+    fn follow_up_origin_absent_is_not_written_and_a_direct_origin_round_trips() -> Result<()> {
+        let sample = samples()
+            .into_iter()
+            .find_map(|(document, _)| if let PipelineDocument::FollowUp(follow_up) = document { Some(follow_up) } else { None })
+            .expect("a follow_up sample");
+        let json = serde_json::to_value(PipelineDocument::FollowUp(sample.clone()))?;
+        assert!(json["value"].get("origin").is_none(), "an absent origin is not written");
+        assert!(!rmp_serde::to_vec_named(&PipelineDocument::FollowUp(sample.clone()))?.windows(6).any(|window| window == b"origin"));
+        let PipelineDocument::FollowUp(decoded) = serde_json::from_value::<PipelineDocument>(json)? else { unreachable!() };
+        assert_eq!(decoded.origin, None);
+
+        let mut direct = sample;
+        direct.origin = Some(MemoryOrigin::Direct { room: "!dm:chat".into(), with: vec!["@sample:chat".into()] });
+        let document = PipelineDocument::FollowUp(direct);
+        document.validate()?;
+        let json = serde_json::to_value(&document)?;
+        assert_eq!(serde_json::from_value::<PipelineDocument>(json)?, document);
+        let packed = rmp_serde::to_vec_named(&document)?;
+        assert_eq!(rmp_serde::from_slice::<PipelineDocument>(&packed)?, document);
+        assert!(packed.windows(6).any(|window| window == b"origin"), "the origin key is written");
+        Ok(())
+    }
+
     #[test]
     fn target_repos_bounded_and_distinct() {
         let with_repos = |repos: Vec<OrgRepo>| {
diff --git a/crates/huginn-mind/src/fixtures.rs b/crates/huginn-mind/src/fixtures.rs
index 34d429e..2eebee0 100644
--- a/crates/huginn-mind/src/fixtures.rs
+++ b/crates/huginn-mind/src/fixtures.rs
@@ -290,6 +290,7 @@ pub(crate) fn follow_up(label: &str, source: PipelineRef) -> PipelineDocument {
         item: "Per-kind admission rules.".into(),
         why_it_can_wait: "The organ owns admission.".into(),
         owner: s("Hands"),
+        origin: None,
     })
 }
 
diff --git a/crates/huginn-mind/src/query.rs b/crates/huginn-mind/src/query.rs
index c9de13e..eb16a94 100644
--- a/crates/huginn-mind/src/query.rs
+++ b/crates/huginn-mind/src/query.rs
@@ -140,7 +140,16 @@ pub enum PipelineFacts {
         invariants: Vec<Label>,
         range: CommitRange,
     },
-    FollowUp { label: Label, source: PipelineRef, repo: OrgRepo, owner: Short, item: Line },
+    FollowUp {
+        label: Label,
+        source: PipelineRef,
+        repo: OrgRepo,
+        owner: Short,
+        item: Line,
+        /// Where the Persona turn that admitted it was asked; absent on follow-ups no turn admitted.
+        #[serde(default, skip_serializing_if = "Option::is_none")]
+        origin: Option<MemoryOrigin>,
+    },
     Resolution { subject: PipelineRef, sequence: u32, outcome: ResolutionOutcome, resolved_on: Date },
     Instance { instance: Slug, display_name: Short, host: Short, created_at: Date },
     Stewardship { instance: Slug, repo: OrgRepo, sequence: u32, assigned_on: Date, note: Line },
@@ -216,6 +225,7 @@ impl PipelineFacts {
                 repo: value.repo.clone(),
                 owner: value.owner.clone(),
                 item: value.item.clone(),
+                origin: value.origin.clone(),
             },
             D::Resolution(value) => Self::Resolution {
                 subject: value.subject.clone(),
@@ -1632,6 +1642,27 @@ mod tests {
         assert!(matches!(&found[0].facts, PipelineFacts::Memory { sort: MemorySort::Rapport, origin: MemoryOrigin::Room { .. }, salience_permille: 500, .. }), "{:?}", found[0].facts);
     }
 
+    /// A follow-up's origin reaches its header facts when it has one, and is absent when it has none.
+    #[test]
+    fn a_follow_up_header_carries_the_origin_its_turn_recorded() {
+        let mut mind = seeded();
+        let q1 = id("question", "Q1");
+        let D::FollowUp(mut asked) = follow_up("FU-dm", r(K::Question, &q1)) else { panic!() };
+        asked.origin = Some(MemoryOrigin::Direct { room: s("!dm:chat"), with: vec![s("@op:chat")] });
+        committed(admit(&mut mind, vec![question_n(1), D::FollowUp(asked), follow_up("FU-old", r(K::Question, &q1))]));
+        let PipelinePageItems::Headers(found) = mind.query(&of_kinds(&[K::FollowUp])).unwrap().items else { panic!("headers") };
+        let origin_of = |label: &str| {
+            found.iter().find_map(|header| match &header.facts {
+                PipelineFacts::FollowUp { label: found, origin, .. } if found.0 == label => Some(origin.clone()),
+                _ => None,
+            })
+        };
+        assert_eq!(origin_of("FU-dm"), Some(Some(MemoryOrigin::Direct { room: s("!dm:chat"), with: vec![s("@op:chat")] })));
+        assert_eq!(origin_of("FU-old"), Some(None));
+        let wire = serde_json::to_value(found.iter().find(|header| matches!(&header.facts, PipelineFacts::FollowUp { origin: None, .. })).unwrap()).unwrap();
+        assert!(!wire.to_string().contains("\"origin\""), "an absent origin is not written");
+    }
+
     /// A withdrawal pulse admitted into the mind is read back as a withdrawal: its
     /// facts say so, `voted` selects it, and a later plain vote is not one.
     #[test]
diff --git a/crates/mind-body/src/persona.rs b/crates/mind-body/src/persona.rs
index caf6b0d..d5f7a81 100644
--- a/crates/mind-body/src/persona.rs
+++ b/crates/mind-body/src/persona.rs
@@ -1905,6 +1905,7 @@ fn start_self_run(
         item: ask.brief.as_str().into(),
         why_it_can_wait: "Started from chat; the Self run that claims it works it now.".into(),
         owner: "self-run".into(),
+        origin: None,
     });
     let claim = PipelineRef { kind: PipelineKind::FollowUp, id: pipeline_key(&follow_up).map_err(|_| anyhow!("the follow-up could not be keyed"))?.as_str().into() };
     let mut documents = vec![follow_up];
diff --git a/crates/mind-body/src/persona/tests.rs b/crates/mind-body/src/persona/tests.rs
index 604a702..718e214 100644
--- a/crates/mind-body/src/persona/tests.rs
+++ b/crates/mind-body/src/persona/tests.rs
@@ -1160,6 +1160,7 @@ fn open_follow_up(label: &str, source: &PipelineRef, item: &str) -> PipelineDocu
         item: item.into(),
         why_it_can_wait: "It can.".into(),
         owner: "Hands".into(),
+        origin: None,
     })
 }
 
diff --git a/crates/mind-body/src/testkit.rs b/crates/mind-body/src/testkit.rs
index 24f6c8f..e56da8c 100644
--- a/crates/mind-body/src/testkit.rs
+++ b/crates/mind-body/src/testkit.rs
@@ -510,6 +510,7 @@ pub(crate) fn follow_up(label: &str, source: &PipelineRef) -> PipelineDocument {
         item: "Later.".into(),
         why_it_can_wait: "It can.".into(),
         owner: "Hands".into(),
+        origin: None,
     })
 }
 
diff --git a/schemas/cultnet/epiphany.pipeline.follow_up.v2.schema.json b/schemas/cultnet/epiphany.pipeline.follow_up.v2.schema.json
index ecb6b1c..7b550cf 100644
--- a/schemas/cultnet/epiphany.pipeline.follow_up.v2.schema.json
+++ b/schemas/cultnet/epiphany.pipeline.follow_up.v2.schema.json
@@ -45,6 +45,95 @@
       "maxLength": 1000,
       "type": "string"
     },
+    "MemoryOrigin": {
+      "description": "Where a Persona turn's batch came from and whom she heard it from: a\nmemory's origin and a brief's. The organ derives it from the batch of the\nturn; the model never writes it.\n`about` names whom a memory concerns, this names the room and the voices.",
+      "oneOf": [
+        {
+          "additionalProperties": false,
+          "description": "A turn in rooms: their aliases comma-joined, and the batch's other senders.",
+          "properties": {
+            "Room": {
+              "properties": {
+                "heard_from": {
+                  "items": {
+                    "$ref": "#/$defs/Short"
+                  },
+                  "maxItems": 8,
+                  "type": "array"
+                },
+                "rooms": {
+                  "$ref": "#/$defs/Short"
+                }
+              },
+              "required": [
+                "rooms",
+                "heard_from"
+              ],
+              "type": "object"
+            }
+          },
+          "required": [
+            "Room"
+          ],
+          "type": "object"
+        },
+        {
+          "additionalProperties": false,
+          "description": "A direct message: the DM's room id, and the others who spoke in it (whom\nshe heard it from in confidence).",
+          "properties": {
+            "Direct": {
+              "properties": {
+                "room": {
+                  "$ref": "#/$defs/Short"
+                },
+                "with": {
+                  "items": {
+                    "$ref": "#/$defs/Short"
+                  },
+                  "maxItems": 8,
+                  "type": "array"
+                }
+              },
+              "required": [
+                "room",
+                "with"
+              ],
+              "type": "object"
+            }
+          },
+          "required": [
+            "Direct"
+          ],
+          "type": "object"
+        },
+        {
+          "const": "Wake",
+          "description": "A wake: no one spoke.",
+          "type": "string"
+        },
+        {
+          "additionalProperties": false,
+          "description": "A Self run of hers, by its label.",
+          "properties": {
+            "SelfRun": {
+              "properties": {
+                "run": {
+                  "$ref": "#/$defs/Short"
+                }
+              },
+              "required": [
+                "run"
+              ],
+              "type": "object"
+            }
+          },
+          "required": [
+            "SelfRun"
+          ],
+          "type": "object"
+        }
+      ]
+    },
     "OrgRepo": {
       "description": "A GitHub repository as `Org/Repo`, at most 140 UTF-8 bytes (39 + 1 +\n100). The owner is 1 to 39 `[A-Za-z0-9-]` bytes with no leading or\ntrailing hyphen; the repo is 1 to 100 `[A-Za-z0-9._-]` bytes, is never\n`.` or `..`, and does not end in `.git`, ASCII-case-insensitively.\nIdentity is case-insensitive: `GameCult/Epiphany` and `gamecult/epiphany`\nare the same repository.",
       "maxLength": 140,
@@ -109,6 +198,7 @@
   },
   "$id": "https://gamecult.dev/epiphany/cultnet/epiphany.pipeline.follow_up.v2.schema.json",
   "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "description": "A follow-up. `origin` is where the Persona turn that admitted it was\nasked, as the organ derived it: a brief records the conversation whose\nmessage started it. Absent on follow-ups no Persona turn admitted and\non briefs admitted before it existed.",
   "properties": {
     "campaign": {
       "$ref": "#/$defs/Slug"
@@ -126,6 +216,16 @@
       "maxItems": 16,
       "type": "array"
     },
+    "origin": {
+      "anyOf": [
+        {
+          "$ref": "#/$defs/MemoryOrigin"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
     "owner": {
       "$ref": "#/$defs/Short"
     },
diff --git a/schemas/cultnet/epiphany.pipeline.memory.v2.schema.json b/schemas/cultnet/epiphany.pipeline.memory.v2.schema.json
index 6aa31aa..c0dd2e6 100644
--- a/schemas/cultnet/epiphany.pipeline.memory.v2.schema.json
+++ b/schemas/cultnet/epiphany.pipeline.memory.v2.schema.json
@@ -11,7 +11,7 @@
       "type": "string"
     },
     "MemoryOrigin": {
-      "description": "Where a memory came from and whom she heard it from. The organ derives it\nfrom the batch of the turn that wrote the memory; the model never writes it.\n`about` names whom a memory concerns, this names the room and the voices.",
+      "description": "Where a Persona turn's batch came from and whom she heard it from: a\nmemory's origin and a brief's. The organ derives it from the batch of the\nturn; the model never writes it.\n`about` names whom a memory concerns, this names the room and the voices.",
       "oneOf": [
         {
           "additionalProperties": false,
diff --git a/schemas/cultnet/huginn.mind_request.v1.schema.json b/schemas/cultnet/huginn.mind_request.v1.schema.json
index c6fe586..08f6082 100644
--- a/schemas/cultnet/huginn.mind_request.v1.schema.json
+++ b/schemas/cultnet/huginn.mind_request.v1.schema.json
@@ -578,7 +578,7 @@
       "maxLength": 1000
     },
     "MemoryOrigin": {
-      "description": "Where a memory came from and whom she heard it from. The organ derives it\nfrom the batch of the turn that wrote the memory; the model never writes it.\n`about` names whom a memory concerns, this names the room and the voices.",
+      "description": "Where a Persona turn's batch came from and whom she heard it from: a\nmemory's origin and a brief's. The organ derives it from the batch of the\nturn; the model never writes it.\n`about` names whom a memory concerns, this names the room and the voices.",
       "oneOf": [
         {
           "description": "A turn in rooms: their aliases comma-joined, and the batch's other senders.",
@@ -1405,6 +1405,7 @@
       ]
     },
     "PipelineFollowUp": {
+      "description": "A follow-up. `origin` is where the Persona turn that admitted it was\nasked, as the organ derived it: a brief records the conversation whose\nmessage started it. Absent on follow-ups no Persona turn admitted and\non briefs admitted before it existed.",
       "type": "object",
       "properties": {
         "campaign": {
@@ -1423,6 +1424,16 @@
           },
           "maxItems": 16
         },
+        "origin": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/MemoryOrigin"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
         "owner": {
           "$ref": "#/$defs/Short"
         },
diff --git a/schemas/cultnet/huginn.mind_response.v1.schema.json b/schemas/cultnet/huginn.mind_response.v1.schema.json
index b41a6e9..9e4e83a 100644
--- a/schemas/cultnet/huginn.mind_response.v1.schema.json
+++ b/schemas/cultnet/huginn.mind_response.v1.schema.json
@@ -705,7 +705,7 @@
       "maxLength": 1000
     },
     "MemoryOrigin": {
-      "description": "Where a memory came from and whom she heard it from. The organ derives it\nfrom the batch of the turn that wrote the memory; the model never writes it.\n`about` names whom a memory concerns, this names the room and the voices.",
+      "description": "Where a Persona turn's batch came from and whom she heard it from: a\nmemory's origin and a brief's. The organ derives it from the batch of the\nturn; the model never writes it.\n`about` names whom a memory concerns, this names the room and the voices.",
       "oneOf": [
         {
           "description": "A turn in rooms: their aliases comma-joined, and the batch's other senders.",
@@ -3083,6 +3083,17 @@
                 "label": {
                   "$ref": "#/$defs/Label"
                 },
+                "origin": {
+                  "description": "Where the Persona turn that admitted it was asked; absent on follow-ups no turn admitted.",
+                  "anyOf": [
+                    {
+                      "$ref": "#/$defs/MemoryOrigin"
+                    },
+                    {
+                      "type": "null"
+                    }
+                  ]
+                },
                 "owner": {
                   "$ref": "#/$defs/Short"
                 },
@@ -3582,6 +3593,7 @@
       ]
     },
     "PipelineFollowUp": {
+      "description": "A follow-up. `origin` is where the Persona turn that admitted it was\nasked, as the organ derived it: a brief records the conversation whose\nmessage started it. Absent on follow-ups no Persona turn admitted and\non briefs admitted before it existed.",
       "type": "object",
       "properties": {
         "campaign": {
@@ -3600,6 +3612,16 @@
           },
           "maxItems": 16
         },
+        "origin": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/MemoryOrigin"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
         "owner": {
           "$ref": "#/$defs/Short"
         },