Unidentified pencil drawing of doorway and two children; painting of Venice scene; newspaper print of drawing of Yuletide cottage, designed by Tjaden; print of Venice scene

Correspondence, scrapbooks, diaries, photographs, business and financial records, lists and other records pertaining to the practice of architecture and the renovation of Tjaden Hall on the Cornell campus, clippings, broadsides, diplomas, certificates, licenses, and other papers. Collection includes framed images, drawings, watercolors, and other visual images deriving from Tjaden's professional career, with numerous references to individual clients and patrons. Also includes books, leaded glass items, and architectural instruments.