- The New Puritan: New England Two Hundred Years Ago; Some Account of the Life of Robert Pike, the Puritan Who Defended the Quakers, Resisted Clerical Domination, and Opposed the Witchcraft Prosecution
- The Prostrate State
- The Restoration Of The Currency (1868)
- First blows of the Civil War; the ten years of preliminary conflict in the United States. From 1850 to 1860. A contemporaneous exposition. Progress of ... With letters, now first published ..
- Horace Greeley in 1872