- P. [235], “Here am” inserted for illegible characters. 7 characters because capital H and lower m are each nearly 2 characters wide. Barely visible in original edition and reprint—defective typeface in original.
- P. [302], changed “in Sahara” to “in the Sahara”.
- Silently corrected obvious typographical errors and variations in spelling.
- Retained archaic, non-standard, and uncertain spellings as printed.