Date (happened)
after 15 March 1968
(probable)
passage 537488 (lecture nid 1338, delivered 1968-03-15); corroborated by passage 537531 (lecture nid 1339, also delivered 1968-03-15)
Told / reported
15 March 1968
delivery claim on lecture nid 1338, corroborated independently by catalog (#421) and by the transcript's own byline dateline; lecture nid 1339, delivered the same day, corroborates further