Casson was born in
Old, Northamptonshire, the son of Rev. George Casson and Frances Gilbert. He was educated at
Marlborough College and
Hertford College, Oxford. After graduating he joined the Indian Civil Service and arrived in India in 1889. and was appointed Deputy Commissioner in the Punjab in 1888. He served as Additional District Magistration for
Bannu from 1893, Deputy Commissioner for
Jhelum district from 1896, and later as Commissioner for
Lahore Division and
Ambala Division. He served as President of the
Punjab Legislative Council between 1922 and 1925. He married Gertrude Russell, daughter of
Sir Andrew Hamilton Russell, on 23 October 1897 at
Bombay. They had one child, Joan Gilbert Casson, Casson died in 1952. ==References==