We began the retreat, for which I was now more impatient than my Indian, when he pointed out to me an effect of water different from those of the round ripples produced by droplets of water.  Having waved to me to remain silent and motionless, he nimbly trapped by hand a fish some 6 inches long, something like a nice little sardine.  It had small fins, and was no stranger to my savage, for at once he showed me that the fish had no eyes.  That astonished me and I felt that I had discovered a marvel of nature unknown to the most knowledgeable ichthyologists.  What matter that it was already known to the brute who accompanied me, if this knowledge remained obscure in his ignorance! We tried in every possible way to catch a second.