Volume 2 and 3 as a convenience for the reader.

The Index had no page numbers in the original text; page numbers from 1i to 36i have been added for completeness. For clarity, some volume identifiers (i. or ii. or iii.) have been added, or removed, in the Index. Only references within this volume have been hyperlinked.

The Index has some references to page numbers with a *, eg 551*. These are valid references; the book printer inserted pages 543*-556* between pages 542 and 543 in Vol iii.