[INCUNABULA REFERENCE]. WALTERS, Henry. Incunabula typographica. Baltimore, 1906. 8o, original sheep -- HARTSHORNE, Rev. C. H. The Book Rarities in The University of Cambridge. 8o, calf -- SPENCER, George John Earl. Aedes Althoripianae. London, 1822. 2 vols., 8o, original boards -- Another copy bound as one, cloth boards -- CARVALHO, David N. A Catalogue of the Collection. New York, 1911. 8o, cloth boards -- ASTOR LIBRARY. Alphabetical Index. New York, 1851.