PREFACE. 13 



acceptable. It has also given me the opportunity to 

 introduce new matter not originally contemplated. 



During the period of delay above mentioned the writer 

 was in receipt of hundreds of letters of enquiry from 

 as many kind friends. It was impossible to reply to all 

 of these. He, however, improves the present as a fit- 

 ting occasion to return his grateful thanks to those of 

 his correspondents for the tangible evidences of confi- 

 dence and esteem thus manifested. 



And to the Messrs. Duncan Bros., too, is he under 

 obligations for the hearty manner in which they took 

 the little brochure under their wing, pushing the same 

 through the press with their accustomed energy. 



323 Euclid Avenue, Cleveland, O., September 1880. 



