Authors: F.
- Sturm, Frank Pearce 1879-1942
- Sullivan, James Frank 1853-1936
- Sumichrast, Frederick C. de (Frederick Caesar de) 1845-1933
- Surtees, Scott F. (Scott Frederick) 1814-1889
- Swain, George Fillmore 1857-1931
- Sweetser, M. F. (Moses Foster) 1848-1897
- Sykes, D. F. E. 1856-1920
- Talman, Charles Fitzhugh 1874-1936
- Tarbell, F. B. (Frank Bigelow) 1853-1920
- Taylor, Benjamin F. (Benjamin Franklin) 1819-1887
- Taylor, Frederick Winslow 1856-1915
- Taylor, F. Walter (Frank Walter) 1874-1921
- Taylor, Will F. -
- Teall, F. Horace (Francis Horace) 1850-
- Temple, Frederick 1821-1902
- Terry, Jean F. (Jean Finlay) 1865-1951
- Theis, O. F. (Otto Frederick) 1881-
- Theobald, Fred. V. (Frederick Vincent) 1868-1930
- Thieme, Richard 1944-
- Thiselton-Dyer, T. F. (Thomas Firminger) 1848-1923
- Thomas, Frederick W. (Frederick William) 1806-1866
- Thwing, Charles Franklin 1853-1937
- Tilney, F. C. (Frederick Colin) 1870-1951
- Tournebize, François 1856-1926
- Tout, T. F. (Thomas Frederick) 1855-1929
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