William Edward Vickers (1889–1965) was an English mystery writer better known under his pen name Roy Vickers, but used also the pseudonyms Roy C. Vickers, David Durham, Sefton Kyle, and John Spencer. He is the author of over 60 crime novels and 80 short stories. Vickers is now remembered mostly for his attribution to Scotland Yard of a Department of Dead Ends, specialized in solving old, sometimes long-forgotten cases, mostly by chance encounters of odd bits of strange and apparently disconnected evidence.