PREFACE vii 



derived abundant practical experience from the 

 best source. 



In the preparation of this book I have met 

 with many difficulties : some have appeared 

 almost insurmountable, but with the help of kind 

 friends these difficulties ha^e disappeared. I take 

 this opportunity to return them my heartfelt 

 thanks, and to God be all the praise. 



J. B. 



SaWBRIDGEWORTHj 



September, 1904. 



