Letter book with entries dating from 13 May 1848 to 22 April 1850, including letters to Robert Walsh (U.S. Consul, Paris), John Jay, Commodore W.C. Bolton, Daniel J. Carroll, General Jackson Morton, William Carroll, and James Richard; and photographs. Most of the letters have to do with patents, settlement of estates, payment of bills, and the circumstances of the Brent family after the death of John Carroll Brent's father.