Neville's forty-nine years since leaving Barbados
Date (happened)
between 19 February 1922 and 18 February 1923
unresolved
between 19 February 1922 and 18 February 1923
estimated · probable · preferred
Reasoning
He states leaving Barbados at age seventeen. Anchored to his 1905-02-19 birth date (hist_event 950), being seventeen spans 1922-02-19 to 1923-02-18, so the honest claim is a between-range, not an exact date. The lecture's own '49 years since' arithmetic (told circa 1971 minus 49) independently lands on ~1922, consistent with this range. Confidence held at probable, not certain, because this is an age recalled decades after the fact.
Told / reported
c. 1971
estimated
Reasoning
The owning lecture's own delivery claim gives circa 1971 at certain confidence, derived from Neville's stated 49-years-since-leaving-at-17 arithmetic against his 1905 birth year, independently corroborated by the family's just-celebrated fiftieth business anniversary. This passage belongs to that lecture, so it was told circa 1971, landing at the same ceiling as the source claim; day/month are not given.