September 15, 1835, South Kingston, Rhode Island.
Niles was educated at Phillips Andover Academy and admitted to the New York Bar in 1857. He practiced law in Providence, Rhode Island, and New York City. In the 1870’s, he was living in Morristown, New Jersey. In 1872, he served as speaker of the New Jersey state assembly. He had a grandfather with the same name who wrote Hymn of Bunker Hill (also known as The American Hero). His works include: