Neville describes stepping in vision from his chair or bed into other worlds which become wholly real, noting that although his body lies naked on the bed he finds himself clothed and in a body there.
Date (happened)
c. 1929
relative · probable · preferred
Why
Refines the existing circa/certain 'forty-odd years' relative claim into an approximate absolute year now that the telling's date is known.
Reasoning
Passage 547058 has Neville say he has slept in the nude 'for the last forty-odd years' relative to the telling, and describes stepping into visionary worlds while in that state. The lecture is dated 1969-05-05 exact/probable, so forty-odd years prior places the onset of this decades-long practice at circa 1929.
the last forty-odd years
relative
Told / reported
5 May 1969
estimated · probable
Reasoning
Passage 547058 (in lecture nid 1858) is Neville describing stepping bodily, though naked, into fully real visionary worlds where he finds himself clothed -- this passage is the telling. The lecture's only delivery claim dates it 1969-05-05 exact/probable, so the telling inherits that date and precision.