Background
Cassels was born in Oporto, Portugal, the sixth son of John Cassels, a merchant, and Ethelinda Cox, a distant relation of Warren Hastings.
Cassels was born in Oporto, Portugal, the sixth son of John Cassels, a merchant, and Ethelinda Cox, a distant relation of Warren Hastings.
He was educated at Repton School and Street John"s College, Cambridge.
Cassels married Mary Louisa Legg, daughter of Edward Legg, in Shanghai, China, in 1892. They had several children. He died on 7 November 1925 at Paoling, Western China.
Mrs Cassels died eight days later.
