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In page Harp:

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Mesolithic era paintings from Bhimbetka show harp playing. An arched harp made of wooden brackets and metal strings is depicted on an Indus seal.[1] The works of the Tamil Sangam literature describe the harp and its variants, as early as 200 BCE.[2] Variants were described ranging from 14 to 17 strings, and the instrument used by wandering minstrels for accompaniment.[3] Iconographic evidence of the yaal appears in temple statues dated as early as 600 BCE.[4] One of the Sangam works, the Kallaadam recounts how the first yaaḻ harp was inspired by an archer's bow, when he heard the musical sound of its twang.[citation needed]