Other manuscripts of Norreys Jephson O'Conor are to be found at:

• Papers of Norreys Jephson O'Conor, 1890-1964 at the Huntington Library, Art Collections and Botanical Gardens, San Marino, California.
• Margaret Clapp Library, Wellesley College, letters to Katherine Lee Bates and Jeannette Augustus Marks.
• The Library of the University of Pennsylvania, letters to Maxwell Struthers Burt and Van Wyck Brooks.
• Harvard University Library, letters and manuscripts to Amy Lowell.
• The New York Public Library.
• The Library of the University of Virginia.
• Syracuse University Library, letters to Horace Gregory.

The major manuscript collections of Grace Hazard Conkling's work are held in the Smith College Archives and in the Smith College Mortimer Rare Book Room.

Norreys Jephson O'Conor's published work includes:

Battles and Enchantments, Retold from Early Gaelic Literature (New York: Houghton Mifflin, 1922)

Beside the Blackwater (New York: John Lane Company, 1915)

Celtic Memories, and other Poems (London: E. Mathews, 1913)

Changing Ireland: Literary Backgrounds of the Irish Free State, 1889-1922 (Cambridge, Mass.: Harvard University Press, 1924)

The Child's Hansel and Gretel; a Fairy Tale Opera Adapted from the Libretto of Adelheid Wette; Tr. by Norreys Jephson O'Conor (New York: F. A. Stokes, 1909)

The Fairy Bride = TheLennan Shee : a Prologue to Irish Drama in Three Acts (New York: S. French, 1916)

Godes Peace and The Queenes-Vicissitudes of a House, 1539-1615 (Cambridge, Mass.: Harvard University Press, 1934).

Late Offering (Los Angeles: W. Ritchie Press, 1952)

A Servant of the Crown in England and in North America, 1756-1761, Based Upon the Papers of John Appy, Secretary and Judge Advocate of His Majesty's Forces (New York: D. Appleton-Century, 1938)

Songs of the Celtic Past (New York: John Lane Company, 1918)

There was Magic in Those Days (New York: F. A. Stokes, 1928)