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- Leszynsky, W. M., author1
- Letchworth, William Pryor, 1823-1910, author1
- Levy, Robert, 1864-1945 author1
- Lindley, Walter, 1852-, author1
- Loeb, Hanau W. (Hanau Wolf), 1865-1927, author1
- Longyear, H. W. (Howard Williams), 1852-1921, author1
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- Margáin, José O., author1
- Marsh, Othniel Charles, 1831-18991