THE WALK 



145 



hind comes down. The leading fore-leg is that wliich does not form the 

 diagonal support. 



THE WALK 



Before instantaneous photography had proved otherwise it used to be 

 supposed that two feet must necessarily be upon the ground at once while 



the diagonals were advanced, and that the legs moving in pairs synchron- 

 ously, four would be on the ground for a fraction of time. The camera 



