"The affinity that this word (Hakra) has botli to the Ghaggar, and Sankra,” would lead to the conclusion of either being the stream referred to. The former we know as being engulphed in the sands about the Hariana confines, while the Sankra is a stream which, though now dry, was used as a line of demarcation even in the time of Nadir Shah. It ran eastward, parallel with the Indus, and by making it his boundary Nadir added all the fertile valley of the Indus to his Persian kingdom."