|←Author Index: Po||Horace Porter
|United States soldier and diplomat. He served as a general in the Union Army during the American Civil War, and as personal secretary to President Grant (1869-1872).|
- "Grant, Ulysses S.," in Appletons' Cyclopædia of American Biography, New York: D. Appleton and Co. (1892)
- “Ulysses S. Grant” in The Presidents of the United States, 1789-1914, 1914.