According to Spink, Harisena encouraged a group of associates, including his prime minister Varahadeva and Upendragupta, the sub-king in whose territory Ajanta was, to dig out new caves, which were individually commissioned, some containing inscriptions recording the donation. This activity began in many caves simultaneously about 462. This activity was mostly suspended in 468 because of threats from the neighbouring Asmaka kings. Thereafter work continued on only Caves 1, Harisena's own commission, and 17–20, commissioned by Upendragupta. In 472 the situation was such that work was suspended completely, in a period that Spink calls "the Hiatus", which lasted until about 475, by which time the Asmakas had replaced Upendragupta as the local rulers.