168 PRINCIPLES OP P. VI. 



long change ; but when arrived at the middle 

 of the house, work back to the other end of 

 the wall from which you came. This is no 

 change, but only tries the obedience of the 

 horse, and the proficiency of your hand and 

 aids. 



It is in these lessons that the pupil acquires 

 an accurate knowledge of the use and effect 

 of the aids necessary in more confined move- 

 ments. 



This pace should be performed with great 

 care at a walk. 



This and all constrained lessons, being par- 

 ticularly distressing to the horse, and rendered 

 more so, frequently, by the awkwardness of 

 beginners, they should not be continued too 

 long at a time, and in that short time should 

 be frequently changed. The working twice 

 round the riding house to one hand — chang- 

 ing and working to the contrary hand, is suf- 

 ficient. 



