35mm colour photographic slides, including images of publications, floor plans, and drawings. Slides were taken by the depositor to support the teaching of architectural history courses for the WEA and for building conservation courses at the University of York. These courses were based on work carried out by the depositor for English Heritgae [now Historic England] revising and rewriting the Statuatory List of Buildings of Architectural and Historical Interest in York, published in the late 1990s.