- Saur, P. B. (Prudence B.)1
- Silva, Máximo, author1
- Sinkler, Wharton, 1845-1910 author1
- Smith, D. J., Dr1
- Sperry, Lyman B. (Lyman Beecher), 1841-1923, author1
- Stall, Sylvanus, 1847-1915, author1
- Starr, Louis, 1849-19251
- Stowell, C. H. (Charles Henry), 1850-, author2