Adams to CPH, Oct. 27, 1888, Adams to Villard, Oct. 29, 1888, Adams to Barnum, Oct. 29, 1888, UP, PO, OC, vol. 45, ser. 2, r. 40.
Adams Diary, Dec. 23, 1888, Adams Papers, r. 3.
Charles Francis Adams, Diary, Feb. 3, 1889, pp. 35-36, 40-41, Adams Papers, r. 3.
William Elsey Connelley, The Life of Preston B. Plumb, 1837-91 (Chicago: Browne & Howell Company, 1913), 373.
Charles Francis Adams, Diary, Feb. 3, 1889, pp. 31-32, Adams Papers, r. 3.
John James Ingalls, A Collection of the Writings of John James Ingalls: Essays, Addresses, and Orations (Kansas City, Mo., Hudson-Kimberly Publishing Co., 1902), 183-98.
In nineteenth-century usage syllabub meant frothy or insubstantial.