William Rounseville Alger, an American clergyman and author, cousin of the preceding, born at Freetown, Mass., in 1823. He graduated at Harvard college in 1847, studied for the ministry, and became pastor of a Unitarian church in Roxbury. In 1855 he removed to Boston, where he succeeded Theodore Parker as minister of the "Liberal Christians" who worship in Music Hall, Boston, where he still continues to preach (1873). His works comprise "The Poetry of the Orient, or Metrical Specimens of the Thought, Sentiment, and Fancy of the East" (1856); "A Critical History of the Doctrine of a Future Life" (1861); "The Genius of Solitude, or the Loneliness of Human Life" (1867); and " Friendships of Women " (1870).