 In "Ice in the Bedroom", Leila Yorke is his favorite author.In "Big Money", his firm is named Matters & Cornelius, and he lets Peacehaven to Lord Biskerton.A very pretty young girl, with blue eyes and soft, golden-brown hair, Miss Derrick is the daughter of the late Colonel Eustace Derrick, and is aged twenty-two when we first meet her in "Sam the Sudden".