On Slay Down
First published in the UK magazine Argosy (04/1962) with the original title, then as The Future of the Service in 3 issues of Ellery Queen's Mystery Magazine (US - Mar. 1963, UK - Jul. 1963 & AUS - Sep. 1963) and the anthology Spies And More Spies (1967). Also published in the anthology To Catch A Spy (1965) and the collection with original title.