Neville recounts a first-person vision of experiencing himself as a young ship's captain, 'not more than twenty-three', who strapped himself to his ship and went down with it.
Date (happened)
before 14 April 1967
unresolved
before 14 April 1967
bound
Why
M7 dating pass (529; 525's readers, packet 001)
Reasoning
'Down to the Sea in Ships' (lecture 1276) is delivered 1967-04-14 (certain; chronology 356) and he tells the vision in the past tense, so it happened by then. Nothing dates it more closely.
before February 1928
bound · refuted
Why
pm-actor-525: refuted by the M7 dating pass (529; 525's readers, packet 001): Passage 535608 says 'You are the captain of the ship, regardless of your age. I was a young captain. I was not more than twenty-three' and that he has no memory image of a physical experience: twenty-three is the captain's age in the vision, not Neville's age when he had it.
Reasoning
Neville states his own age at the time of the ship-captain vision as not more than twenty-three; anchored on his certain birth date (hist_event 950, 1905-02-19), that bounds the event to before 1928-02.
Told / reported
14 April 1967
estimated · probable
Why
His stated age ('not more than twenty-three') gives no computable happening-date within this packet -- no birth year is present to anchor it.
Reasoning
This is the telling of Neville's first-person ship-captain vision; the lecture's own delivery date is when he told it, capped at probable by the ceiling on the underlying legacy-backfilled delivery claim.