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A photograph of the Nassau County Museum of Art during winter time. The museum is located in Roslyn Harbor, N.Y., and was formerly the Frick Estate.

A photograph of the Nassau County Museum of Art during winter time. The museum is located in Roslyn Harbor, N.Y., and was formerly the Frick Estate.

A photograph of the Nassau County Museum of Art during winter time. The museum is located in Roslyn Harbor, N.Y., and was formerly the Frick Estate.

A photograph of the Nassau County Museum of Art during winter time. The museum is located in Roslyn Harbor, N.Y., and was formerly the Frick Estate.

Exterior front view of Nassau Hospital. Sender’s name on the front and addressee information on the back, both handwritten. Note: In 1985, Nassau Hospital changed its name to Winthrop University Hospital. (B&W)

Exterior front and side view of Nassau Hospital. Addressee information and date “June1912” are handwritten on verso. Note: In 1985, Nassau Hospital changed its name to Winthrop University Hospital. (B&W)

A photograph of the Nassau County Courthouse sundial. The sundial was a gift from Donald Everett Axinn and the architect was Frank Gencorelli.

Exterior view of the Nassau County Courthouse building. Note: The building later became known as the Old Nassau County Courthouse and then as the Theodore Roosevelt Executive and Legislative Building. (Color)

Exterior view of the Nassau County Courthouse building. Note: The building later became known as the Old Nassau County Courthouse and then as the Theodore Roosevelt Executive and Legislative Building. (Color)

Exterior front and side view of the Nassau County Courthouse building. Note: The building later became known as the Old Nassau County Courthouse and then as the Theodore Roosevelt Executive and Legislative Building. Message on the front and addressee…