"You'll frighten them too if you do," I observed.  "Let us try to get up to them more cautiously."  One great difficulty was to keep Surley back, or he would have followed the herd till he had caught one of them, or broken his neck over a precipice.  Consoling ourselves for our disappointment with the hopes of getting near enough up to the next herd to fire before being seen, we scrambled on as before.  Now and then we glanced behind us to mark the spot where we had left Fleming, while we kept an eye in the direction Mr McRitchie had taken; and on that broad exposed mountain-side, we did not think it possible that we could miss each other.  We climbed on, therefore, without any misgivings as to how we should find our way back again.  I fastened my handkerchief through Surley's collar to keep him back.  He was thus able also sometimes to help me up a steep place or a rock quicker than I could have got by myself.  Jerry followed close behind me.  The distance was, we found, greater than we expected to the next herd.  We were, fortunately, to leeward of them, and not one of them noticed our approach.  We halted behind a thick cactus.  There was a rock some three hundred yards further off, and within a good shot of the herd.