Deep Water

For the Harper first, any copyright-page code whose year letter is later than G is a reprint. For the UK Heinemann 1958, the book was reprinted within its year of publication, so the 1958 date alone does not establish a first impression: the same-year reprint carries reviews of Deep Water itself on the back flap of the jacket, which the first impression does not, and the copyright line should be checked in parallel.