PROSPER L. EASTMAN, son of Joseph Eastman, Esq., was born March 1, 1825. Jan. 4, 1846, married Eleanor H. Haven, daughter of Moses, and granddaughter of Rev. Jacob Haven. In 1855 he went West, and engaged as a drover in Ohio and Wisconsin for four years, at the expiration of which time he returned to New York City, and became connected in business with his brother as a cattle broker. He is now located at Albany-the great cattle rendezvous from the West-where he is operating in connection with his brother at New York, Like his brother, in him are combined enterprise and sound judgment.