In the novel 4.50 from Paddington, Lady Alice Crackenthorpe was the wife of Harold. She is the daughter of an impoverished earl.
Lady Alice is described as being a "plain woman", but "quite a pleasant one". She is a "thin woman with sandy-coloured hair, a well-arched nose and vague, hazel eyes". Her voice is well-bred, monotonous, and rather depressing.
Harold had not been in love with her, but had married her because he thought her family would have been nice relations for any sons they may have had. However, they did not have any children. They had nothing in common, nothing to talk about, and no memories to share.
Lady Alice often stayed away with relations, and usually went to the Riviera in the winter. This suited both her and Harold.