According to it’s website: “The New York Public Library has been an essential provider of free books, information, ideas, and education for all New Yorkers for more than 100 years. Founded in 1895, NYPL is the nation’s largest public library system, featuring a unique combination of 88 neighborhood branches and four scholarly research centers, bringing together an extraordinary richness of resources and opportunities available to all.
“Serving more than 17 million patrons a year, and millions more online, the Library holds more than 51 million items, from books, e-books, and DVDs to renowned research collections used by scholars from around the world. Housed in the iconic 42nd Street library and three other research centers, NYPL’s historical collections hold such treasures as Columbus’s 1493 letter announcing his discovery of the New World, George Washington’s original Farewell Address, and John Coltrane’s handwritten score of ‘Lover Man.’” http://www.nypl.org/
Their holdings include significant Crowleyana, found in their: H.L. Mencken Papers 1905-1056 holdings in their Manuscripts and Archives Division
“Originals: 48 linear feet (120 boxes and 7 slipcases). Copies: 69 microfilm reels. Restricted access; Manuscripts and Archives Division; Permit must be requested at the division indicated.”
J.B. Pinker and Sons collection of papers, part of the Henry W. and Albert A. Berg Collection of English and American Literature
“This is a synthetic collection consisting of typescripts and manuscripts, financial documents, and correspondence. The bulk of the collection is correspondence from miscellaneous and unidentified authors to the agency, from 1893-1925, letters on miscellaneous business, and letters between various individuals including William Morris Colles, Joseph Conrad, T. S. Eliot, Henry James, and Charles Morgan, which came with the correspondence from the agency, some of which relate to it. There are letters to the agency by Richard Aldington, Georges Aubry, Maurice Baring, Arnold Bennett; David William, James, and Muirhead Bone; Sir Hugh Charles Clifford, Alvin Langdon Coburn, Joseph Conrad, Richard Curle, Walter De la Mare, J. M. Dent & Sons, Doubleday, Page & Co., St. John Greer Ervine, Ford Madox Ford, Rose Fyleman, Walter Lionel George, Perceval Gibbon, Algernon Gissing, George Gissing, Louis Golding, Robert Graves, Harper & Bros., Basil Macdonald Hastings, Ernest Hemingway, Ernest Henham, Laurence Housman, Violet Hunt, Aldous Huxley, William W. Jacobs, Alfred A. Knopf, D. H. Lawrence, Librairie Gallimard, Marie Adelaide Lowndes, Edith J. Lyttelton, Compton Mackenzie, Archibald Marshall, Methuen & Co. Ltd., A. A. Milne, Charles Morgan, Robert Nichols, Edward P. Oppenheim, Barry Pain, Laura Riding, Lewis Anselm da Costa Ritchie, Upton Sinclair, G. B. Stern, George S. Street, Frank Swinnerton, Arthur Symons, T. Fisher Unwin, Hugh Walpole, Withers, Bensons, Birkett & Davies, P. G. Wodehouse, Leonard Woolf, Eric B. Young, Arnold Zweig, and others, dating from 1898 to 1940.”
John Quinn Memorial Collection
“Collection consists mainly of correspondence, with writings, printed matter and photographs that document Quinn’s artistic and political interests. Correspondence, 1901-1924, is with artists, art dealers, critics, poets, playwrights, booksellers, publishers, and members of his family. Files of letters and letterbooks contain correspondence relating to his interest in the artistic and literary scene in America and abroad, events in Ireland especially during the Home Rule movement, his purchase of paintings, sculpture, first editions and manuscripts of contemporary literature, and the sale of his library and manuscript collection. Also includes typescripts of literary works, typescript of the catalog of Quinn’s art collection, ledgers, sales and exhibition catalogs, periodicals, and photographs of Quinn with individual artists and group portraits.”
PS the Main New York Public Library – located at the corner of 42nd Street and Fifth Avenue – houses a complete collection of Behutet, the quarterly publication of Thelesis Oasis, OTO, and maintains an ongoing subscription to the publication.