XXTl PREFACE. 



amount of space, and it would be too invidious a task to single 

 out any, when all have so willingly co-operated. The measure 

 of assistance received has only been limited by the demands 

 made upon it. 



To the officials connected with the various libraries con- 

 sulted, for affording me unusual facilities, to private possessors 

 of scarce books, and to authors where information has been 

 sought at first hand, I gladly render my sincerest thanks. 



B. DATDON JACXSOK 



30, Stockwell Road, London, S.W. 

 January 21th, 1881. 



