The John H. Yardley Collection of Architectural Letterheads provides a unique view of New York City's evolution during the nineteenth and twentieth centuries. Selected for their illustrations of buildings in lower Manhattan, these pieces of stationery include rare images of the city's commercial architecture, much of which is no longer extant. Because the letterheads are organized by street, users can chart a path through the city, one address at a time, and see New York City as it was in another era. The Yardley Collection was donated to the Avery Architectural and Fine Arts Library by the wife of Mr. John H. Yardley in memory of her husband. Assembled over many years, the Yardley Collection reflects a sensitivity to New York's geographic and architectural heritage. These images of distinctive buildings now join the Avery Library's other strong holdings in architectural ephemera, a reflection of Avery's commitment to preserving ephemera as an essential and irreplaceable visual record of the historic built environment.