Australasian (Melbourne, Vic.: 1864 - 1946), Saturday 20 March 1937, page 21
Stud Notes by Sterling
MUTABLE
WHEN Mutable won the Australian Cup brilliantly on Saturday, March 6, most people were surprised that a son of Drake would be able to stay out a soundly run two miles and a quarter. Drake has been better known as a sire of sprinters rather than stayers, but in this case Mutable has proved the exception. He really is a soundly bred horse, and no doubt he obtains his staying blood from his dam, Varium. Bred by Mr. “S. A. Rawdon” at Toolamba, in the Goulburn Valley of Victoria, Mutable was sold as a yearling to W. J. Smart for 80 guineas. His dam, Varium, was bred in New Zealand, and raced by…