Neville practices strict asceticism for seven years
Date (happened)
c. 1926
estimated · probable · preferred
Why
Start year (1926) is arithmetic (1933 minus seven), not independently attested; end year rests on a different lecture's corroborated dating of the same Barbados episode, not on this event's own witness passage.
Reasoning
The passage gives only a duration (seven years) and two relative anchors (before/after the Barbados trip), not calendar dates. The Barbados trip itself is independently dated elsewhere in the corpus to November 1933, so the seven-year ascetic period is estimated to run circa 1926 to circa 1933, ending on his return. This is the happening date range, not the 1968 telling date.
Told / reported
4 November 1968
stated
Reasoning
The lecture whose passage carries this telling is dated 1968-11-04 by two independently sourced certain claims; the sole dissenting claim (1969-10-16) is itself marked doubtful and contradicted.