Items in New York Heritage are organized into collections, which provide additional context for understanding their significance and meaning.

The Lewis H. Brown Collection consists of sixty-four letters written by Lewis Henry Brown, Lewis’ brother Burritt Brown, and Albert Ransom, Burritt Brown’s friend and tent-mate.
The Long Island Historic Postcard Collection consists of postcards of towns and villages in Queens, Nassau, and Suffolk Counties of New York dating from the 19th and 20th centuries.