1 JANUARY 1921, Page 35

WORKS OF REFERENCE.—The Post Office London Directory for 1921 (Kelly's

Directories, 8 vols., 64s. net) appears with Its usual punctuality, despite the difficulties that have to be overcome in handling such an enormous mass of names and figures. The corrections made in this hundred and twenty- second issue are said to number a quarter of a million, and we can well believe it. The book is well printed, and we have tested it in vain for mistakes. The third volume is devoted to the county suburbs—that is, the suburbs within the County of London. Some day, perhaps, the arbitrary division between these suburbs and other suburbs will be given up, so far as the Directory is concerned. But it will then be difficult to say where Greater London ends.—The Atinanach Hachette, 1921 (Ilachette, (Hr. 50o. net), is as entertaining as ever. It is in a sense the French Whittaker, but it seeks to amuse as well as to instruct, in a way that no self-respecting British reference- book would ever venture to do. The pictorial method of exposition is applied with astonishing ingenuity in this " little popular encyclopaedia of practioal life," which seems to touch on almost every topic in a light-hearted fashion.