The word _Rug_ is used in this volume in the following sense: "A covering for the floor; a mat, usually oblong or square, and woven in one piece. Rugs, especially those of Oriental make, often show rich designs and elaborate workmanship, and are hence sometimes used for hangings," In several books rugs and carpets are referred to as identical. In fact most written information on rugs has been catalogued under the term _carpets_; and there seems to be good reason for assuming that the terms _tapestries_ and _carpets_, as used in ancient times, were synonymous with the word _rugs_ of the present day, for these were spread loosely on the floor without the aid of fastenings. Historical references to spinning and to the weaving of tapestries date back to a very early period. An ancient Jewish legend states that Naamah, daughter of Lamech and sister of Tubal-Cain, was the inventor of the spinning of wool and of the weaving of thread into cloth. On at least two of the wonderful rock-cut tombs at Beni-Hassan, in Egypt,--2800-2600 B.C.,--there are pictures of weavers at work. In one, women are filling a distaff with cotton, twisting it with a spindle into thread, and weaving this on an upright loom. Beside them is a man, evidently an overseer, watching the weavers and their work. The other wall-painting represents a man weaving a checkered rug on a horizontal loom. Other monuments of ancient Egypt and of Mesopotamia bear witness that the manufacture of rugs dates a considerable time prior to 2400 B.C. At Thebes a fresco, dating 1700-1000 B.C., represents three men weaving at an upright loom. A small rug, discovered in that city some time between the years 666 and 358 B.C., and now in the possession of Mr. Hay in England, is described by Sir J. Gardner Wilkinson as follows: "This rug is eleven inches long by nine broad. It is made like many carpets of the present day, with woollen threads on linen string. In the centre is the figure of a boy in white, with a goose above it, the hieroglyphic of 'child' upon a green ground, around which is a border composed of red, white, and blue lines. The remainder is yellow, with four white figures above and below, and one at each side, with blue outlines and red ornaments; and the outer border is made up of red, white, and blue lines, with a fancy device projecting from it, with a triangular summit, which extends entirely round the edge of the rug. Its date is uncertain, but from the child, the combination of the colors, and ornamental border, I am inclined to think it really Egyptian, not of the Pharaonic, but of the Greek and Roman period." Dr. Samuel Birch, who edited the last edition of Wilkinson's work, affirms that this is so. On the marbles of Nineveh is represented the pectoral worn by Sardanapalus. It is an exact miniature of a Kurdish rug of modern times. The Tree of Life, the motif of most of the Persian rug designs, is in the centre, and the border is ornamented with rosettes and bars.