Death at the President's Lodging

UK Gollancz 1936 is the true first and the census claim is confirmed. The US edition is Dodd, Mead (New York) 1937, retitled SEVEN SUSPECTS — a title-change trap rather than a "first thus": it is the first American edition, published a year after the London first, and a collector searching the US title will not surface the true first. Both are collected under their respective titles; precedence is not in doubt given the one-year gap.