MissScarlett: Here's the simul game found by User: WilhelmThe2nd.
<From London’s 'Daily Mail' newspaper, Tuesday, April 30th, 1929, page 14 (with descriptive notation changed to algebraic notation):
< CAPABLANCA PLAYS 35 OPPONENTS.
Señor J. R. Capablanca, the former world chess champion, played 35 games simultaneously with members (and their friends) of the Maccabeans' Club—a club composed of Jewish professional men—at the Montefiore Hall, St. John's Wood, N.W., on Sunday. He won 29 of these, drew three, and lost the other three.
The winner of one of these games was M. Sultan Khan, one of the best chess players in India and a member of the staff of Col. the Hon. Nawab Sir Umar Hayat Khan (Councillor of State).>>
Mir Sultan Khan (kibitz #205)
Be interesting to know what, if anything, Capa knew about his opponent beforehand. Khan had won the Indian championship in 1928, and Capa had been in England for a few weeks, playing in the Ramsgate tournament, so I expect he'd got wind of him, so to speak. Even so, would he have recognised the little brown man in the Jewish club as anybody out of the ordinary?
Three months later, Khan would win the British championship. A few weeks later, he'd be giving his own simul: Sultan Khan vs C W Brown, 1929