A thirsty fox came to a well along the road. He was just about to lower a bucket down the well to get a refreshing drink of water when a large frog sitting on the well wall spoke to him. “Good day Mr Fox”, said the frog. “What is your business here today, if I may ask?”
“Well, I am not sure that it is any concern of yours,” said the fox, “but if you must know, I am thirsty and need a drink from this well”. “Ah!” said the frog, “then it is just as well that we have met, for I fear that you will be disappointed. This well is quite dry, but there is another further down the road and, fortunately, that one isn’t dry. In fact, it is absolutely full of the most refreshing water imaginable”.
“Well there must be at least a drop of water left in this one after the recent rains”, said the fox. He picked up a stone and threw it into the well. Almost immediately there was a loud plop, as the stone hit the water. “See!” said the fox, “All is well; there must be some water down there”.
“I fear I have misled you slightly”, said the frog, “but I was only thinking about your health. The truth is that the water that remains in this well is quite unsuitable for drinking. It has somehow become horribly tainted and I fear that, if you were to drink it, you might become quite unwell”.
“Oh, very well” said the fox.” Perhaps I should walk a little further down the road and take a drink at the next well. I just hope that well isn’t tainted as well.” “Oh no,” said the frog, “the water in that well is as cool and clear as crystal. If you are thirsty, you would do well to set off straight away.”  “Well I may as well go and see”, said the fox, and he trotted off down the road to the next well.

When the fox was well out of sight the frog leapt back into the well and joined its little tadpoles who were playing and swimming about in the well water. “Well now”, said the frog. “I have fooled Mr Fox and convinced him not to drink from our well, so we’ll be safe for now.” “Well done, Mum”, said the tadpoles.