Includes correspondence received by Dendy or sent by Dendy. This correspondence relates to Dendy's graduate studies at Columbia University in New York, and to Dendy's teaching work in the field of architectural history at the University of Toronto and at Carleton University in Ottawa. This correspondence also relates to research work which Dendy carried out on the Massey family and their architects.
Two titled file folders can also be found here. One contains correspondence written by Howard Moran to the Public Archives of Nova Scotia in connection with research he was conducting into the 1917 Halifax explosion. The second file includes correspondence, clippings, and other materials re the Co-Operative City Park Apartments where Dendy lived.
Other materials contained in this file include ephemera, clippings, ms. notes, and publishers' catalogues.

Fonds consists of materials documenting William Dendy's life and career as an architectural historian including university course notes, research material for published works, research material on the history of Canadian architecture and other research interests such as Forest Hill, Hamilton, the architects Frank Darling and William Somerville, and the Massey family. Some materials relate to Dendy's teaching activities, Toronto walking tours and consultancy projects.

Also present are articles, card files, clippings, correspondence, electronic records, ephemera, manuscripts, maps, manuscript and typescript notes, as well as photographs, negatives, and approximately 40,000 slides (including more than 17,000 images of Canadian architecture, urban space, and landscape). The slides were taken by Dendy and are each individually identified by him.

The William Dendy Library consists of more than 3,500 books and 2,500 periodical issues. For the most part, the collection focuses on the history of architecture, but other topics, such as music and literature, are featured as well.