London: Hodder and Stoughton Limited, n.d., [1920]. Octavo, pp. [i-iv] v [vi] vii [viii] [1] 2-303 [304: blank], original blue-green cloth, front and spine panels stamped in black. First edition. A rare collection of short fiction featuring occult investigator Professor Arnold Rhymer, M.D., and Inspector Brown of the C.I.D. Five longish, well-developed stories that hit expected notes of interest for both the weird tale and the detective story. [Reference: Bleiler, The Guide to Supernatural Fiction 949. Locke, A Spectrum of Fantasy, p. 128. Wilson, Shadows in the Attic, p. 304. Bleiler (1978), p. 114. Reginald 08229].

London: Books Limited, n.d., [1921]. Octavo, pp. [1-14] 15-299 [300-304: blank] [note: first two and last two leaves used as front and rear free endpapers and paste-downs, original decorated light brown cloth, front and spine panels stamped in black and blind, all edges rough cut. First edition. Scarce thriller featuring occult investigator Professor Arnold Rhymer, M.D., whose earlier exploits were recorded in Key's rare collection, THE BROKEN FANG AND OTHER EXPERIENCES OF A SPECIALIST IN SPOOKS (1920), who "tries to decipher a typed message made by one of the departed." - Locke, A Spectrum of Fantasy, p. 128. [Reference: Wilson, Shadows in the Attic, p. 304. Bleiler (1978), p. 114. Reginald 08230].