The best West-end books are Boyle’s Court Guide and Webster’s Royal Red Book. The latter is a very commendable work. The Post Office Directory, published every year, is an extremely thick and valuable volume, and is at once an Official, Street, Commercial, Trades, Law, Court, Parliamentary, Postal, City, Conveyance, and Banking Directory. All three may be obtained of any respectable bookseller.
Source: A Handbook for London, Past and Present. Peter Cunningham. Published by John Murray 1849.