Booksellers of olden times.--The Longman's family.--Constable, Cadell, and Black.--John Murray.--William Blackwood.--Chambers, Knight, and Cassell.--Henry Colburn.--The Rivingtons, the Parkers, and James Nisbet.--Butterworth and Churchill.--Edward Moxon.--Kelly and Virtue.--Thomas Tegg.--Thomas Nelson.--Simpkin, Marshall, and Co.--Charles Edward Mudie.--W. H. Smith and Son. --Provincial booksellers.