London: Ernest Benn, Limited, 1925. First edition. 8vo. (106), (1) (ads) pp. Inscribed by Coward to cast member Mary Robson on front free endpaper: "For Mary/With all, love and thanks/for your sweetness to me/Noel/1924". Front panel of original dust-jacket laid in, as well as a printed ad for the play's tryout at the Everyman Theatre in Hampstead, and the original printed wraparound band from the book: "THE VORTEX/NOW BEING PLAYED AT THE/ROYALTY THEATRE, LONDON". Original blue cloth, printed paper labels on cover and spine, toned; all edges trimmed; endpapers lightly spotted; in blue quarter goatskin solander box.