Emphyrio

US precedes and is the true first: Doubleday (Garden City, NY), 1969 — the key Vance hardcover of the period, with no prior magazine serialization to complicate precedence. Britain came late and in wrappers: the first UK edition is the Coronet (Hodder & Stoughton) paperback of 1980, so there is no competing British hardcover first and no UK-vs-US contest to adjudicate. Later Dell paperback, Underwood-Miller, and Millennium/Gollancz issues are reprints or "first thus."