A Historical treatise written by Kashmiri Poet-politician Kalhana[CE 1148 ] in the form of Sanskrit poems in eight chapters termed as Tarangas (Waves) describing the lives and circumstances of the Hindu kings that prevailed in Kashmir during their times. Chanpak (Champak), the father of Kalhan, was a reliable secretary of King Harsh Dev (108 9 -1101) of Kashmir.