diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -3575,6 +3575,7 @@
     'HeraldTranscript' => array(
       'HeraldDAO',
       'PhabricatorPolicyInterface',
+      'PhabricatorDestructibleInterface',
     ),
     'HeraldTranscriptController' => 'HeraldController',
     'HeraldTranscriptGarbageCollector' => 'PhabricatorGarbageCollector',
diff --git a/src/applications/herald/storage/transcript/HeraldTranscript.php b/src/applications/herald/storage/transcript/HeraldTranscript.php
--- a/src/applications/herald/storage/transcript/HeraldTranscript.php
+++ b/src/applications/herald/storage/transcript/HeraldTranscript.php
@@ -1,7 +1,9 @@
 <?php
 
 final class HeraldTranscript extends HeraldDAO
-  implements PhabricatorPolicyInterface {
+  implements
+    PhabricatorPolicyInterface,
+    PhabricatorDestructibleInterface {
 
   protected $objectTranscript;
   protected $ruleTranscripts = array();
@@ -196,4 +198,16 @@
   }
 
 
+/* -(  PhabricatorDestructibleInterface  )----------------------------------- */
+
+
+  public function destroyObjectPermanently(
+    PhabricatorDestructionEngine $engine) {
+
+    $this->openTransaction();
+      $this->delete();
+    $this->saveTransaction();
+  }
+
+
 }
diff --git a/src/applications/system/engine/PhabricatorDestructionEngine.php b/src/applications/system/engine/PhabricatorDestructionEngine.php
--- a/src/applications/system/engine/PhabricatorDestructionEngine.php
+++ b/src/applications/system/engine/PhabricatorDestructionEngine.php
@@ -48,6 +48,19 @@
       }
     }
 
+    // Nuke any Herald transcripts of the object, because they may contain
+    // field data.
+
+    // TODO: Define an interface so we don't have to do this for transactions
+    // and other objects with no Herald adapters?
+    $transcripts = id(new HeraldTranscript())->loadAllWhere(
+      'objectPHID = %s',
+      $object_phid);
+    foreach ($transcripts as $transcript) {
+      $transcript->destroyObjectPermanently($this);
+    }
+
+    // TODO: Remove stuff from search indexes?
     // TODO: PhabricatorFlaggableInterface
     // TODO: PhabricatorTokenReceiverInterface
   }