First published as The Vanishing of Prince Schomyl in the Empire News (Oct. 22, 1933) then in The Thriller (Nov. 10, 1934), The Saint Detective Magazine (US - Apr. 1956), Suspense (UK - Sep. 1959) and The Saint Mystery Magazine (UK - Oct. 1963) with the known title. Also published in the collections and .
Inspector Teal is given the job of safeguarding a crown made for a foreign prince.