Date (happened)
1949
(probable)
passage 547113 (lecture nid 1859), 'something that he stumbled upon in 1949... he discovered a way back in 1949', citing a Science News Letter issue Neville says he owns
Told / reported
7 January 1966
delivery claim d1 on lecture nid 1859, dateline '1/07/66', state=confirmed, triply corroborated (chrome dateline, page-title '(1966)', and internal Feynman-Nobel/schedule reasoning)