1893 — Joseph Cairn Simpson, "The Trotting Stride", Wallace's Monthly, Volume 28, No. 12, February 1893:
A "full" sister in blood is the dam of one in the list, and a three-quarter brother has shown quarters in thirty-six seconds, and his trainer says that he can beat 2:30 every day in the week.
1976 — Robert M. Denhardt, Foundation Sires of the American Quarter Horse, University of Oklahoma Press, ISBN0806113375, page 222:
He was a three-quarter brother of the other Top Hat.
2005 — Ken McLean, Designing Speed in the Racehorse, The Russell Meerdink Company, Ltd. (2005), ISBN9780929346809, page 89:
However, it would not surprise me if he became a better sire than his three-quarter brother Cape Town.
2009 — Costa Rolfe, Winners of the Melbourne Cup: Stories That Stopped a Nation, Black Dog Books (2009), ISBN9781742035130, page 103:
A three-quarter brother to the ill-fated Lord Cardigan, the colt grew up quite literally under the careful eye of his owner, having been stabled in Mayo's backyard, and the pair soon formed an affectionate bond.