[OLD MASTER DRAWINGS]. COLVIN, SIDNEY. Selected Drawings from Old Masters in the University Galleries and in the Library at Christ Church Oxford. Parts I-VI. Oxford: Clarendon Press, 1903-07. Profusion of plates. 6 volumes, folio, contents loose in original board portfolios, as issued, cloth ties (some lacking), some portfolio backs defective -- FLECHSIG, EDUARD, Editor. Zeichnungen Alter Meister im Landesmuseum zu Braunschweig. Deutsche, Nr. 1-42. Frankfurt, 1920-22. 42 plates. Folio, contents loose in half cloth portfolio, as issued, cloth ties -- VASARI SOCIETY for the Reproduction of Drawings by Old Masters. Second Series, Parts I-XVI. Oxford: University Press, 1920-35. Profusion of plates. 16 parts in 15 volumes, folio, contents loose in quarter cloth portfolios, as issued, cloth ties. (22)