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We describe the linking of a `computer as cocktail napkin' program that interprets hand-drawn sketches and diagrams with Archie III, a case based design aid, to support case-based reminding in conceptual design. Each case in Archie's library includes stories, problems, and responses indexed and accessed by carefully chosen features. In addition to text, photographs, and drawings, many items in Archie's case library are illustrated by simple diagrams. We have added these diagrams to Archie's indexing scheme, so a hand-drawn sketch can be used to retrieve items tagged with similar diagrams.