(1847 – 25 March 1909) was a prominent English barrister, King's Counsel and Master of the Bench of Gray's Inn, who was also a Methodist minister, founder of the Pentecostal League of Prayer, and author of 34 Christian books.
He is particularly remembered as an advocate of British Israelism, the belief that people of Western European descent are also the direct lineal descendants of the Ten Lost Tribes.
Reader Harris drifted from the liberal view of Christianity of his teens to join Charles Bradlaugh's Ethical Society.
At the same time the elevated social status of his wife's family brought him entry to the upper strata of London society.
In 1907 Reader Harris wrote his book "The Lost Tribes of Israel", which expressed his belief in the theory that the Anglo-Saxons are descended from the Ten Lost Tribes: Such then are the Scriptures that appear to me to furnish strong evidence in favour of the contention of those who believe that in the Anglo-Saxon race God possesses today the descendants of the house of Israel.