THE LIGHT-HARNESS BREEDS OF IIORSES 97 
present secretary is at Hartford, Conn. The American 
Trotting Association was organized in 1887, and has head- 
quarters in Chicago. The American Trotting Register 
appeared in 1868, with J. H. Wallace as publisher. The 
first volume contained some 3000 entries; 62,000 stallions 
and about 250,000 mares have been registered to date. 
Wallace also established the Yearbook, now in its thirtieth 
volume. The Register, the Yearbook, and Wallace’s 
Monthly were disposed of by Mr. Wallace to the American 
Trotting Register Association, in 1891, and the latter now 
publishes the Register and the Yearbook. As has been 
said, a League of Amateur Driving Clubs has been formed, 
with headquarters in Boston. This league publishes a 
yearbook, giving a summary of matinée races and the 
time made. The first volume includes the races of 1901-2. 
Tue Pactna Horse. Fig. 14. 
By John A. Craig 
108. The pacer is not a separate and distinct breed of 
horses. The name is applied to a class of horses that are 
characterized by the pacing gait. The American Stand- 
ardbred trotting horse breed is the most potent source of 
pacers. 
109. History in Europe. — From the earliest writings 
referring to horses and from the earliest representations 
of them in sculptured frieze, we learn that pacing or 
ambling was a gait common to the horse in earliest times. 
This gait is shown in Greek sculpture and referred to in 
the publications of some of the earliest writers in Spain, 
Great Britain and America. It is unnecessary here to 
recount these early references, for they are accessible in 
H 
