180 THE BREEDS OF LIV E-STOCK 
extent the hardiness, endurance, sound feet and legs that 
are the inheritance of a half-wild existence under adverse 
conditions. These ponies are exceedingly rare in Amer- 
ica, and we have many types much superior in confor- 
mation and other desirable qualities nearer home from 
which to breed. 
Literature. — References cited in the text are to the following 
works: E. D. Miller, Modern Polo, W. Thacker & Co., London; 
Hon. James Penn Boucaut, The Arab, the Horse of the Future, 
Gay & Bird, Strand, London (1905); Polo Pony Society, Stud-book, 
Volume 5; Youatt, second edition (1846); Sir Walter Gilbey, Small 
Horses in Warfare, Bart, Vinton & Co., London, E. C.; Sir Walter 
Gilbey, Thoroughbred and Other Ponies, Bart, Vinton & Co., 
London, E. C.; J. C. Appleby, Nimrod; Mr. Whyte, History of 
the British Turf. Other references are here given, that are of 
interest: Catherine Sinclair, Shetland and Its Inhabitants; L. 
Stejneger, ‘Den Celtiske pony, tarpanen of fjordhesten,’ Naturen 
(1904). M. Horace Hayes, Points of the Horse, W. Thacker & 
Co., London, E. C. (1897); J. C. Ewart, The Multiple Origin of 
Horses, Trans. Highland and Agricultural Society, Edinburgh 
(1904); W. Ridgeway, The Origin and Influence of the Thorough- 
bred Horse, Cambridge (1905); S. B. Elliot, M.D., The Shetland 
Pony, Belle Meade, Va. (1906). 
