Carl du Prel. The Philosophy of Mysticism, Translated from the German by C.C. Massey. London: George Redway, 1889. 

TWO VOLUMES, COMPLETE (225 x 150 mm) V1: xxviii, 332; V2: 316  Disbound, cover present, but text block has detatched, 20th century tape intervention along spine and attempting to repurpose flyleave as wrapper. 20th century pencil annotations throughout in margins. Vol. 2 in much better condition, intact, clean text block, endbands bumped. Bound in red-brown publishers cloth binding. Vol 1: FAIR; Vol 2: FAIR. In need of rebinding. 

Translation into English from Carl du Prel's original German text exploring mystical experiences, dreams, and somnambulism from a scientific and, specifically, a neo-Schopenhauerian, psychophysical perspective.