early we find the crwth in the hands of the Celtic players, as noticed in chapter VI. The form given in Fig. 22 (p. 107) is rather late, most likely, and somewhat of a degradation, since many of the elements of the violin are wanting in it. The clumsy resonance body is of the same width all the way, preventing the depression of one end of the bow in order to avoid sounding adjacent strings. As the bridge of the crwth was nearly flat, the adjacent strings were octaves, or related in such a way that when sounding together chords were produced. Many have supposed that all the strings were sounded together at each drawing of the bow. This is not impossible, for in one of the sculptures on a capital in the old church at Boscherville in Normandy a stringed instrument is represented in which the tone is produced by a revolving bow, on the principle of the hurdy-gurdy, whereby chords must have been produced continually. (See p. 208.) The same carving has two stringed instruments of the violin family, one held like a violin (No. 6), the other bass downward, like a 'cello (No. 1). These two figures are fragments of the same carving. They are supposed to date from about the eleventh century. Many similar representations occur, such as the following from old manuscripts. [Illustration: Fig. 38.] These oval instruments had the same deficiency as the crwth, in respect to indentations at the side of the instrument, for permitting the depression of the bow. The oldest type of this instrument in use appears to have been the form known as the rebec, the Arab form, which came into Europe in the time of the crusades. According to certain authorities this was the primitive type from which our violin was derived. The form is better shown in the cut on page 196, which is from an Italian painting of the thirteenth century. The body of the rebec was pear-shaped. It was contemporaneous with many other forms partaking of the shape of the guitar. From this came the family of viols, which were very popular in England during the fifteenth and sixteenth centuries. The viol differed from the violin family proper in having a flat back like a guitar, and rounded corners. The only individual of the viol family which attained to artistic development was the viol da Gamba, or bass viol, which was tuned like a lute, having six strings. This instrument was a favorite with many amateurs until late in the eighteenth century. (See p. 197.) [Illustration: Fig. 39. ANGEL PLAYING A REBEC. (From an Italian painting of the thirteenth century.)] Still more curious was the form of viol known as the barytone, which, in addition to an outfit of six catgut strings upon the finger board, was furnished with twenty-four wire strings, stretched close under the sounding board, where they sounded by sympathetic vibration. This was the instrument which Prince Esterhazy, Haydn's patron, so much admired, and for which Haydn wrote more than 150 compositions. Its form is shown in Fig. 41.