Sorting out the details of where to go and how to get there had been a somewhat bewildering process because of the convolutions and forkings of the river valleys in the mountains. But once Laks had uploaded the geography into his head, the place that leapt out as being of greatest interest was where the Chenab and the Beas originated within just a few kilometers of each other on opposite flanks of a high spine of rock spanned by a nightmare of switchbacks called the Rohtang Pass. Northeast of there was the even higher region of Ladakh, indistinctly bounded by the Line of Actual Control.