Summary:

use Roget’s Thesaurus has come to be as widely accepted and as indispensable to writers as a dictionary and its system and arrangement have become so familiar that any radical alteration of them would lessen the value of the book to those who know their way about it from constant use. For that reason no attempt has been made to modify the main scheme which Roget originally laid down, and except for a few very minor alterations of numbering where the order had become confused the arrangement is the same as in previous editions. Within this scheme the articles have been greatly amplified and expanded, some of the pages containing up to a hundred fresh insertions.