That he was strongly influenced by the writings of Grimod de la Reynière is readily perceptible, though he states in the introduction that his work is a bona-fide register of practical facts, and that he has not printed a recipe which has not been proved in his own kitchen. Before undertaking his task, he had consulted all the treatises obtainable on the subject, amounting to no less than two hundred and fifty volumes. These, he asserts, vary very little from one another, and any one who has occasion to refer to two or three of them will find the recipes almost always the same--equally unintelligible to those who are ignorant, and useless to those who are acquainted with the business of the kitchen. The numerous "Good Housewife's Closets," "Ladies' Companions," and "Gentlewomen's Cabinets," in fact, are virtually identical, save for their titles and forewords. With the recipes of the "Oracle" the reader need not be as much concerned as with its spirit and its epicurean principles, which reveal a strongly marked individuality, and a comprehension far in advance of the time in Great Britain. Oracular and discursive, the author ambles pleasantly along the road of Conviviality, scattering his maxims and dispensing his formulas, while dipping into volume after volume to emphasise his text. The "Oracle" may be briefly described as a quaint medley of cookery, hygienic precepts, science, gastronomy, and domestic economy, written by a _bon vivant_. A long chapter is devoted to the subject of invitations to dinner, wherein punctuality is strictly insisted upon--dining, according to the writer, being the only act of the day which cannot be put off with impunity for even five minutes. He would have the cook the warden in chief, as defined by Mercier, a physician who cures two mortal maladies, Hunger and Thirst; or a _Hominum servatorem_--a preserver of mankind, as designated by Plautus. A good dinner, he maintains, is one of the greatest enjoyments of human life; but it should never be at the mercy of belated guests,--"what will be agreeable to the stomach and restorative to the system at five o'clock will be uneatable and indigestible at a quarter past." When he himself gave a dinner-party, the guests were invited for five o'clock, and at five minutes after the hour specified, the street door was locked, and the key, by his order, was set aside. But it is perhaps in the chapter on advice to cooks, and in his directions as to the minutiæ of boiling, baking, roasting, and frying, that he is most suggestive. A characteristic farewell to the reader concludes the volume, which even to-day may be consulted with profit--an observation that will also apply to many portions of its companion treatise, "The Art of Invigorating and Prolonging Life."