Manasara 6.43

6.43

prācyāṅgulakṛtādbindoruttare cāṅgulaṃ nyaset
pratīcīmātratadbindorīśaprācī prasūtrayet

From the point made by the digits in the east, he should place a digit to the north; / from that point, to the west alone, he should string out the north-eastern east cord;