Organized in three series: I. Architectural drawings & prints. II. Maps, survey drawings and ground plans. III. Specifications and other manuscript project file materials. Series I, which comprises the bulk of the collection, is arranged by architectural project sets.Manuscript items, which relate to project records cataloged as visual materials, have been added to these records as accompanying material. Summary Contains the records of a number of Delaware and Montgomery County (Pa.) and West Philadelphia residential developers, architects, and builders, much of which reflects the rapid suburban development of this area circa 1890-1930. Prominent among the materials is that of the developer Walter B. Smith, for which manuscript items are available giving names of architects, clients, and communities of Smith’s work. Builders J.D. Lengel and Alan G. Smith, have drawings and specifications for several projects, as do the architects Heacock and Hokanson, D. Knickerbacker Boyd, D. Judge DeNean, Horace Trumbauer, Boyd, Abel and Gugert, Thomas W. Sears, Karcher & Smith, Robert W. Pollock, Louis H. Rush, Alexander Mackie Adams, Willing, Sims & Talbutt, Zantzinger, Borie & Medary, Walter F. Price, Frank L. and William L. Price, as well as others. The New York firm of Delano & Aldrich is named on a landscape drawing for a Bryn Mawr property. Prominent among the clients is Isaac H. Clothier, Jr.