Designed to resemble a ceremonial gavel, this silver baby's rattle was given to John Warren at his birth in 1874. Dr. Benjamin Eddy Cotting, a family friend, commissioned it from Crosby, Morse and Foss of Boston. Dr. Cotting was, at the time, president of the Massachusetts Medical Society. The engraving reads "B.E.C. to J.W., the present to the future president, Mass. Med. Soc., Sixth Sept. A.D. 1874." Although all five Warrens were members of the society, only John Warren (1753-1815) and John Collins Warren (1778-1856) held the office of president.