diff --git a/agents/researcher/work/queue-220/r2/BUILD.md b/agents/researcher/work/queue-220/r2/BUILD.md
index 54000e942..a346cae71 100644
--- a/agents/researcher/work/queue-220/r2/BUILD.md
+++ b/agents/researcher/work/queue-220/r2/BUILD.md
@@ -381,3 +381,5 @@ the creative-hidden 503 assertion and the reader catalogue-refusal test. No extr
 
 The exception is an injected `roots` function that throws a `Refusal` itself; only a test could pass one,
 and none does.
+
+Time correction (2026-10-22T14:51:01Z): the heading times of Round 2c (14:55Z) and Round 2d (14:53Z) were written before I read the clock. The commits were made at 14:49:40Z (9a9f6dd54) and 14:50:52Z (176ac262e). The heading of Round 2b (14:46Z) is also an estimate; its commit e4a204836 was made before 14:47:53Z.