His rule is recorded as far south as Sanchi, where several inscriptions in his name have been found, dated to the year 22 (The Sanchi inscription of "Vaskushana"-i.e. Vasishka Kushana) and year 28 (The Sanchi inscription of Vasaska-i.e. Vasishka) of a Kushan era (widely thought to be the second century of the Kanishka era).