26 SHETLANDS UNDERGROUND. 



peat bogs of Scotland do not suit even a cross with the 

 Thoroughbred, so that the little rough shaggy animals may still 

 be found in all their interesting docility, littleness, and ugliness. 

 The most active demand for tliem, and probably the most useful 

 occupation they ever had, arose about forty years ago, when the 

 legislature mercifully decreed that women and children should no 

 longer be nsed as beasts of burden on underground tramways. 

 Since then these little cart horses have worked in places too low 

 for any bigger animal, and some of them have drawn trucks 

 twenty miles a day for sixteen years without ever seeing daylight, 

 or breathing the fresh air with which they were supplied so 

 abundantly in their infancy. Their little legs and short backs 

 sometimes get broken, but their wonderful eyes and lungs seem 

 to stand as those of few other animals would do. 



