Many of his stories have scenes set in caves, and there is a science-fiction or supernatural element in some, although this is restrained. The typical Household hero was a strong, capable Englishman with a high sense of honour which bound him to a certain course of action. He described himself, in terms of his writing, as "sort of a bastard by Stevenson out of Conrad ... Style is enormously important to me and I do try to develop my hero as a human being in trouble."