Visitors to Ladakh may note, rising from the snow desert &mdash a landscape so vast the eye can only deal with it sequentially &mdash a squiggly black line, like a needle trace on icing, that eventually vanishes among a jumble of icy razorback ridges miles up in the Karakoram. Some years ago, while staying at the Ladakh Serai, I asked its manager, Ramesh Nambiar, what I was looking at.