William Crowninshield Endicott, Jr.
Sources
found: His John Endecott and John Winthrop, 1930: t.p. (William Crowninshield Endicott, president of the Massachusetts Historical Society)
found: NUC pre-1956 imprints (hdg.: Endicott, William Crowninshield, 1860-1936; usage: William Crowninshield Endicott; William C. Endicott)
William C. Endicott, Jr. was born in Salem on 28 September 1860, the son of William C. and Ellen P. Endicott. He graduated from Harvard University in 1883 and attended Harvard Law School before beginning his own practice. In 1886 he accompanied his family to Washington, where he served as his father's private secretary. After leaving Washington at the close of the first Cleveland administration in 1889, he resumed his law practice in Danvers until returning to Washington in 1893, first as an attorney specializing in pardons at the Department of Justice and later as private secretary to Attorney General Richard Olney. On leaving Washington he resumed his practice of law in Boston. His activities in Boston included terms as trustee of the Isabella Stewart Gardner Museum (1922-1936), member (1915-1936) and president (1927-1936) of the Massachusetts Historical Society, and treasurer of the Museum of Fine Arts (1920-1936). He died on 28 November 1936.
http://www.masshist.org/collection-guides/view/fa0021 I.S. 12/27/2017
http://library.albany.edu/preservation/brittle_bks/Crawford_Familiesv1/Chpt4.pdf. Page 76 I.S. 12/27/2017