C. S. Lewis
After his conversion to theism in 1929, Lewis converted to Christianity in 1931, following a long discussion and late-night walk with his close friends Tolkien and Hugo Dyson. He records making a specific commitment to Christian belief while on his way to the zoo with his brother. He became a member of the Church of England – somewhat to the disappointment of Tolkien, who had hoped that he would join the Catholic Church.
J. R. R. Tolkien
On 27 October 1916, as his battalion attacked Regina Trench, Tolkien came down with trench fever, a disease carried by the lice. He was invalided to England on 8 November 1916. Many of his dearest school friends were killed in the war. Among their number were Rob Gilson of the Tea Club and Barrovian Society, who was killed on the first day of the Somme while leading his men in the assault on Beaumont Hamel. Fellow T.C.B.S. member Geoffrey Smith was killed during the same battle when a German artillery shell landed on a first aid post. Tolkien's battalion was almost completely wiped out following his return to England.
Tolkien might well have been killed himself, but he had suffered from health problems and had been removed from combat multiple times.