[MODERN AUTHORS]. YEATS, WILLIAM BUTLER. Plays in Prose and Verse, London, 1922, unopened, spine faded, front inner hinge cracked, PRESENTATION COPY, inscribed by the author on front free endpaper: "Alan Porter from his friend W.B. Yeats, Oct 5, 1925" (Porter was a prominent member of Yeats's Oxford circle of young writers) -- EUGENE O'NEILL. Mourning Becomes Electra, New York, 1931, ends of spine a bit worn, front inner hinge cracking, INSCRIBED (in a shaky hand due to illness) on front free endpaper by the playwright: "To Robert Salgo with all good wishes! Eugene O'Neill, Nov. 1946"; tipped in are two Typed Letters Signed from O'Neill's wife Carlotta to Salgo, New York, 2 & 14 Nov. 1946, 2 pages, 8vo & 4to, with envelopes, regarding O'Neill's inscribing of this copy -- THORNTON WILDER. The Bridge of San Luis Rey, New York, 1928, a corner bumped, rear cover slightly soiled, Eighth Printing, PRESENTATION COPY, inscribed by Wilder on title-page: "For Bobsy From Thornton, Greetings, Salutes, Thanks...Nov. 1931"; together 3 vols., 8vo, original cloth, FIRST EDITIONS of the first two, EACH INSCRIBED. (3)