The collection, containing nearly 800 bookplates, includes exemplars of American and English plates of the 18th through the early 20th century. The collection was formed by Dr Baldwin and his wife, Helen Hayes Baldwin. Of special interest is a plate done for Dr Baldwin by the English painter-etcher Charles William Sherborn. The collection contains proofs, prints with remarques on various sizes and types of paper, and correspondence relating to the designing and production of the plate.