sentences:  Mark was born in Chorlton-cum-Hardy, a suburb of Manchester, the youngest of five children of a prosperous mantle manufacturer originally from Yorkshire.He was educated at William Hulme's Grammar School, where he was undistinguished academically, but became captain of rugby and head prefect.When he left school in 1935 he got a job as a carpet salesman, but finding this boring, in 1937 he joined Manchester City Police as a constable, much to the dismay of his father, who considered it beneath him and said becoming a policeman was only one step above going to prison.