The original List of Plates was printed in very small type, and is too wide for this ebook edition. It has been split into two tables, List of Plates and Plates Supplemental Data. Plates in the original book had no captions. Herein, captions have been provided, based upon comparison of the List of Plates with information contained within the illustrations. The html version only of this edition contains larger versions of the Plates, linked with the character "♠" in the captions.
The original caption to Fig. [1] was printed with a footnote anchor, on the same page with its footnote. In this edition, the text of the footnote is moved into the caption, and the footnote was eliminated. Fig. [194] was handled similarly. Footnotes not anchored in captions are renumbered and moved to the ends of chapters.
Page [32]. Comma was added between “south” and “which”, in the sentence “South of the bluff. . . the wall fronting the south which wall also extends . . . wall.”
Page [37], Plate [V]. The List of Plates shows eight separate figures as part of this illustration, but only three, Nos. 1–3 were printed as part of a Plate. Plate V., Nos. 4–8 are evidently the same as Figs. [4]–[8]. So these five illustrations are listed twice (perhaps erroneously?) in the front matter, under different headings.
Page [85]. There were two identical footnote anchors, both pointing to one footnote. In this edition, the footnote has been duplicated, and the footnote anchors made independent.
Page [200]. “One of them, now in the possession of a gentleman of Hillsboro’, is of the . . .” is retained despite the odd single quotation mark.
Page [240]. The footnote begins: “Humboldt states that the Guaynares of the Rio Caura . . .”, perhaps. The spelling of Guaynares is unclear.
Page [280]. The phrase “an open cut mas made” was changed to “an open cut was made”.
Pages [291], [292]. The two very large tables were printed full page, in small type. They have been edited considerably and divided for this edition.
Page [300]. Changed “river guage” to “river gauge”.