Footnotes were numbered in order and moved to the end of the chapter in which the related anchors occur. The anchor for Footnote [17] was missing in the original; it was added where it likely should have been. There are two anchors to Footnote [39]. Return link from the footnote to the text is provided to the first anchor.

The Geology section of St. Colomb Major was printed twice including the population section of the preceding table. At the end of the second geology section were two paragraphs about Castle-An-Dinas that do not discuss geology. The three duplicated geology paragraphs were deleted and the two paragraphs about the castle were moved to precede the table of parish property values.

Noted, not changed:

The book contains the following pen and ink changes made by an unknown hand. The changes were not made to the text, but are indicated below in parentheses:

The Index appears only at the end of Volume 4. It is reproduced here for the convenience of readers. Links are provided only to items in this volume. Page numbers for Index items occasionally are missing in the original.