Gervas's second marriage was to Elspeth Grant (1907–1997) in 1931; she had grown up in Kenya and was a friend of Joy Adamson. After the marriage she wrote "White Man's Country: Lord Delamere and the Making of Kenya". Her life and work are the subject of a 2002 biography. As an author, Elspeth Huxley was well up to Huxley standards, and one of the few wives who was better-known than her husband. "The Flame Trees of Thika" (1959) was perhaps the most celebrated of her thirty books; it was later adapted for television. They had one son, Charles (1944–2015).