It must not be supposed that the modes we have described were the only means of heating houses with which our ancestors were familiar. The Romans in England evidently employed flue-tiles for the artificial heating of houses or baths. In 1849, a course of flue-tiles was found upon a farm near Reigate, in Surrey; they were shown to have been taken from some Roman site in the neighbourhood, and had been used on the farm to form a drain; the apertures for heated air being covered by pieces of Roman wall-tile, or stone, to prevent the soil falling into the flues. One of these flue-tiles is ornamented with patterns, not scored, but impressed by the repetition of stamps, to produce an elaborate design. Several varieties of flue-tiles have been found: one from a Roman bath in Thames Street; and a remarkable double flue-tile, found in the City of London, and preserved in Mr. Roach Smith's collection in the British Museum. These tiles were arranged one upon the other, and carried up the inner sides of the walls of the rooms, to which artificial heat was to be given from the hypocaust, or subterranean stove, by which means it was easy to regulate the temperature. Pliny describes a bedchamber in his villa warmed by the hypocaust and the tiles, with narrow openings. Sometimes the floor and sides were entirely coated with these tiles. The Curfew, or _Couvre-feu_, should be mentioned as an appurtenance to the fireplaces in the Anglo-Norman times. The _couvre-feu_ formerly in the collection of the Rev. Mr. Gostling, and so often engraved, passed into the possession of Horace Walpole, and was sold at Strawberry Hill, in 1842, to Mr. William Knight. It is of copper, riveted together, and in general form resembles the "Dutch-oven" of the present day. In the same lot was a warming-pan of the time of Charles II. In February 1842, Mr. Syer Cuming purchased of a curiosity-dealer in Chancery-lane a _couvre-feu_ closely resembling Mr. Gostling's; and Mr. Cuming considers both specimens to be of the same age--of the close of the fifteenth or early part of the sixteenth century; whereas Mr. Gostling's specimen was stated to be of the Norman period. A third example of the _couvre-feu_ exists in the Canterbury Museum; and early in 1866, a _couvre-feu_--reputed date, 1068--was sold by Messrs. Foster, in Pall Mall.