Neville adopts a strict vegetarian, teetotal, and celibate discipline
Date (happened)
between 19 February 1925 and 18 February 1927
unresolved
between 19 February 1925 and 18 February 1927
estimated · probable · preferred
Reasoning
Against the certain birth anchor (hist_event 950, 1905-02-19), 'twenty, a little after twenty, say twenty-one' spans from the day he turned 20 (1925-02-19) to the day before turning 22 (1927-02-18). Independent corroboration: the same lecture's passage 528246 has him break every part of this discipline in one night aboard the ship returning from the Barbados trip he elsewhere dates to 1933 (sibling event 5946); a seven-year discipline ending there begins circa late 1926, which sits inside this window and supports its upper half. Confidence probable rather than certain because the age itself is a decades-later recollection hedged with 'say, twenty-one.'