Neville had two copies of The Candle of Vision and gave one to his friend Freedom Berry in San Francisco to encourage him in his work.
Date (happened)
after January 1960
unresolved
before 1964
bound · possible
Reasoning
Qualifying passage ids [531820] belong to telling lecture nids [1162]. Each listed lecture contributes the selected safe envelope year 1964 (MAX of its non-refuted delivery years); 1964 is the MIN across telling lectures.
before 28 April 1964
bound
Why
Tightens the phase4 L6a envelope from before 1964 to before 1964-04-28.
Reasoning
L6a envelope tightened to the telling day of nid 1162 (certain delivery 1964-04-28); same premise, finer precision. The phase4 L6a bound on this event is `before 1964`, an envelope over delivery YEARS computed without reading text. Its premise is that the fact is true by the time it is told; on that same premise the DAY of the telling is a strictly better upper bound. Nothing is re-decided — the bound is stated to the precision the evidence always supported. The delivery claim for 1964-04-28 on nid 1162 is held at `certain` by the corpus, which is what carries this claim. #2274; the L6a row stands beside this one.
after January 1960
estimated · possible
Why
M7 dating pass (529; 525's readers, packet 007)
Reasoning
The gift is to encourage Barry in the work; chronology 6628 (Neville sends Freedom Barry to teach in San Francisco, 1960-01-01) is when that work began.