Several other well-authenticated instances could be cited in which one instrument has suggested the construction of another of a superior kind. The prototype of our pianoforte was evidently the dulcimer, known at an early time to the Arabs and Persians who call it _santir_. One of the old names given to the dulcimer by European nations is _cimbal_. The Poles at the present day call it _cymbaly_, and the Magyars in Hungary _cimbalom_. The _clavicembalo_, the predecessor of the pianoforte, was in fact nothing but a _cembalo_ with a key-board attached to it; and some of the old _clavicembali_, still preserved, exhibit the trapezium shape, the round hole in the middle of the sound-board, and other peculiarities of the first dulcimer. Again, the gradual development of the dulcimer from a rude contrivance, consisting merely of a wooden board across which a few strings are stretched, is distinctly traceable by a reference to the musical instruments of nations in different stages of civilization. The same is the case with our highly perfected harp, of which curious specimens, representing the instrument in its most primitive condition, are still to be found among several barbarous tribes. We might perhaps infer from its shape that it originally consisted of nothing more than an elastic stick bent by a string. The Damaras, a native tribe of South-western Africa, actually use their bow occasionally as a musical instrument, when they are not engaged in war or in the chase. They tighten the string nearly in the middle by means of a leathern thong, whereby they obtain two distinct sounds, which, for want of a sound-board, are of course very weak and scarcely audible to anyone but the performer. Some neighbouring tribes, however, possess a musical instrument very similar in appearance to the bow, to which they attach a gourd, hollowed and open at the top, which serves as a sound-board. Again, other African tribes have a similar instrument, superior in construction only inasmuch as it contains more than one string, and is provided with a sound-board consisting of a suitable piece of sonorous wood. In short, the more improved we find these contrivances the closer they approach our harp. And it could be shown if this were requisite for our present purpose that much the same gradual progress towards perfection, which we observe in the African harp, is traceable in the harps of several nations in different parts of the world.