HMS Ulysses

The census claim holds. The true first is Collins (London), 1955 — published October 1955, MacLean's debut novel. The American first is Doubleday (Garden City, New York), 1956, and follows the Collins; it is collected as the US first. Note a cataloguing hazard: a minority of dealer listings date the Collins edition 1956, which reflects later impressions or careless cataloguing rather than a genuine 1956 Collins first. The Collins first is the 1955.