The index was not checked for proper alphabetization or correct page references. Discrepancies between spellings in the Index and on referenced pages were resolved in favor of the latter. Text refers to “Tomson” and “Thomson”, and has both in the Index. Transcriber removed redundant book title preceding page 1 and redundant “Index” heading just before the Index. Footnotes, originally at the bottoms of pages, have been resequenced, collected, and moved to precede the Index. The book refers twice to Dr. Monrad Krhn, but the correct spelling is “Krohn”. Page 11: “Expecting” may be a misprint for “Excepting”. Page 27: “all South of Central America” was printed that way, but in the image of the actual letter that is shown in the book, it is “all South and Central America”. Footnote 59, originally the third footnote on page 71: “attaches” was printed that way, not as “attachés”.