Douglas is mainly remembered for having investigated, and debunked, the claims of Nicolas Notovitch regarding a secret record of Jesus' visit to India being found at the Hemis Monastery.
Douglas made his own visit to the monastery in 1895, and published his findings in the journal Nineteenth Century.
Robert Douglas (1836-1912), Rector at Odell, Bedfordshire, and Annie Johnson (d. 1922).
Art scholar Robert Langton Douglas was his elder brother.
[1] In 1891, he was the tutor and friend of the young Aleister Crowley, introducing him to the "joys of drinking, smoking, card games, and girls".