TWO VOLUME SET. RARE REPRINT EDITION of the comprehensive monograph on Sabians and Sabianism (first published in St.Petersburg in 1856) by Daniel Abramovich Chwolson (1819-1911), an eminent Russian-Jewish orientalist, professor of Oriental languages in the university and theological seminary of St. Petersburg. [BOTH VOLUMES]: 220x155mm. [XXI+825] + [XXXII+920] pages. Green cloth Hardcover. Gilt lettering on front cover and spine. Spine edges bumped. Inner cover and text block edges age-stained. Pages slightly yellowing. [VOL.I]: Cover very slightly curved. [VOL.II]: Rear cover edges and corners slightly bumped. [SUMMARY]: This extremely rare two volume epochal study of a mysterious religious community mentioned in medieval Islamic and other sources is otherwise in very good condition.