"They're on the bank," Sherlock replied a little tightly. The conversation was for John, not for him, and he was trying to concentrate. Finally he had built up a pile large enough to start a small fire, placed it down beside John, and went looking for two larger sticks that he could use to start a spark, as well as some tinder. "There's a few other places we can go. I would not recommend you drinking your own blood, no."