Letter to Wilkinson W H from Collins concerning a book about lichens, 'Lichens of Great Britain' and giving him a copy. W. P. Collins bookseller top left, and the address and date top right. On the back of the letter there are printed listings of 'New Editions of, and recently issued, Important Natural History Works, Now on Sale' with their book descriptions and prices which are available at W. P. Collins, 157, Great Portland Street, London, W. This address is at the bottom of the page.