Ida May Mellen (1877-1970) was an aquarist at the New York Aquarium, 1916-1929. She wrote books and articles in the fields of marine biology and felinology. Collection consists of correspondence, writings, family and personal papers, photographs, and printed matter. Includes personal letters, 1903-1959; correspondence, 1907-1960, with editors, publishers and others relating to Mellen's writings and professional interests; correspondence, 1925-1958, concerning cats; original manuscripts and typescripts of her major unpublished writings; typescripts of poems, lectures and radio talks; and genealogical papers including her study of Mellen family ancestry in America. Also, notes for her writings, personal notebooks, childhood diary and letters, family photographs, newsclippings, and scrapbooks containing her published articles and references to her in print.