Thanks for Smith's criticisms and approval of his manuscript; his intention for it not to claim attention but to be useful. Altered the section on bats following Smith's comment that he had made free with [George] Shaw's work. Preparing second edition of his Welsh tour; spent four months there this summer; intends to include sketch of [Thomas] Pennant's life in style of anecdote, which seems to lay "the greatest hold on the attention of the public".