[6] In 1890, Dickerman left his firm when he was elected to succeed William L. Bull as president of the New York Stock Exchange.
[4] Together, they were the parents of:[2] After the death of his first wife, he remarried to Florence Elaine Calkin at the Grace Church chantry on April 12, 1917.
[8] Florence was a daughter of Freeman Brant Calkin of Yonkers, and according to their New York Times wedding announcement, "Dickerman is many years the senior of his wife.
"[8] Together, Watson and Florence were the parents of: After his retirement in 1909, he devoted his time to breeding "trotting horses and Guernsey cattle"[6] at Hillandale Farm,[4] his country place on Weaver Street, Quaker Ridge in Scarsdale, New York.
Dickerman died at 998 Fifth Avenue, his home on Manhattan's Upper East Side (an Italian Renaissance Palazzo-style luxury cooperative building designed by McKim, Mead & White and built by James T. Lee),[12] on April 5, 1923.
After leaving $20,000 each to the New York Zoological Society and the Home for Incurables, the remainder of his roughly $5,000,000 estate was left to his widow and surviving son.