It was a surprisingly cool April night in Devprayag, an unremarkable concrete hill-town perched above the turbulent confluence of the Bhagirathi and Alaknanda rivers. The sky was clear, a million stars seemed tacked onto the inky blackness, and a sliver of moonlight reflected off the pillars of the Chaukhamba peak in the distance. It had been a very long drive up from Delhi, but we were now firmly in the mountains, and Sanjoy was snoring like a cricket.