Raum, John O. The History of New Jersey: From Its Earliest Settlement to the Present Time, Volume 1, S. 271, J. E. Potter and company, 1877. "Perth Amboy city is situated at the head of Raritan bay. In 1850 it contained 1,865 inhabitants; in 1860, 2,302; and in 1870 2,861. It takes its name from James Drummond, one of the proprietors, and Earl of Perth, and Amboy from Ambo, meaning in the Indian language, a point."