Chapter XVIII was duplicated in the text. The Table of Contents has been changed to reflect the chapter numbers given in the text.
Punctuation has been standardised.
Minor printer errors (e.g. omitted, superfluous or transposed characters) have been fixed.
Misspelled words have been corrected to match correct spellings found elsewhere in the text. Corrections to proper nouns are listed below.
Inconsistencies in hyphenation were retained in the text if both variations were used in equal amounts.
Title page, "SIGNALLING" changed to "[SIGNALING"] (MYSTERIES OF SIGNALING)
Illustration was published at Page 247 in error. It has been moved to Page 347.
Illustration was published at Page 306 in error. It has been moved to Page 316.
Page vi, "Breckenridge" changed to "[Breckinridge]" (Breckinridge--Extra)
Page 10, "Fredericksburgh" changed to "[Fredericksburg]" (Ferry, Fredericksburg)