PREFACE. xi 
With this mass of matter before me I have 
naturally felt strongly interested in making the 
attempt which is now produced. If I have in 
some measure succeeded I shall have the satis- 
faction of knowing that the way for whomsoever 
may succeed me will be less impassable; if I 
have not, Iam ready to throw myself on the in- 
dulgence of those who are best aware of the dif- 
ficulty of the subject. 
Lonpon, 
March S3ist, 1820. 
