Transcriber's Note:
Inconsistent hyphenation and spelling in the original document have been preserved. Obvious typographical errors have been corrected.
Inconsistent or incorrect accents and spelling in passages in French, Latin and Italian have been left unchanged.
[Illustration] captions were provided by the transcriber.
The following possible inconsistencies/printer errors/archaic spellings/different names for different entities were pointed out by the proofers, and left as printed:
Page 291: Leblane should be Leblanc?
Page 311: Ciracchi and Carrachi (in the same letter)?
Page 332: Quixotte should be Quixote?
Page 396: A line (or lines) seem to be missing at the bottom of page 396 after "The compensations to collectors depend on you, and not on".
Page 435: Kosciugha should be Kosciusko?