If the trees—Tilaka, Āmrātaka, Varuṇa, Bhailātaka, Bilva, Tinduka , Aṅkolā, Piṇḍāra, Śirīṣa , Añjana , Parūṣaka , Vañjula and Atibalā , be seen to grow luxuriantly and surrounded by ant-hills, there will be a current at the distance of three cubits to the north of the trees and at a depth of four men and a half.