Date (happened)
  • 1970 (probable)
    derived from the event's own title: "Final four lectures of Neville's 1970 series"
  • between 13 June 1969 and 27 June 1969 (probable)
    passage 545788 (lecture nid 1825, delivered 1969-06-13 per claim d1, certain, independently corroborated by hist_event 565's own 1969-06-13 date), 'I have but two weeks left, that's four lectures'