Date (happened)
between 15 May 1964 and 22 May 1964
passage 539164 (lecture nid 1399), "A letter given me this past week from this young lad"
Told / reported
22 May 1964
delivery claim on lecture nid 1399, internal dateline "5/22/64" corroborated by weekday and series-pattern evidence, overriding doubtful catalog #492