On Yuan Chwang's Travels in India, 629–645 A.D. v2.c19.131

v2.c19.131

At each of the four corners of the Bodhi Tree inclosure, the pilgrim continues, was a large tope. These four topes marked the places, on the verge of the Vajra-seat, where on the P'usa's arrival earthquakes occurred, these disturbances ceasing when he found the Vajrāsana. Within this inclosure, the pilgrim adds, the sacred memorials were crowded together, and it would be impossible to enumerate them. He goes on to describe that a tope to the south-west of the Bodhi Tree inclosure marked the home of the two cowherd maidens who presented the P'usa with milk-gruel, and near it two other topes also connected with this incident.