BUTLER, ELLIS PARKER. Philo Gubb, Correspondence-School Detective. Frontispiece and 19 plates. 8vo, publisher's yellow cloth decorated in black, minimal edgewear; dust jacket, chipped at spine panel tips and top of rear panel, front flap creased, tape repairs on verso; preserved in a custom cloth drop-back case (LMS booklabel). first edition, first issue. Uncommon in jacket. Queen's Quorum 61. Boston: Houghton Mifflin Co., 1918