But what the mink did not know was his undoing. He did not know that the deep covering on the Gray Visitor's throat and breast--firm, close-lying feathers and a lavish padding of down--was an armor too thick and resistant for even his keen teeth. He got a choking mouthful of feathers. He even achieved to scratch the skin beneath and draw blood. Then his savage jaws stretched wide in a choking screech as the steel talons closed inexorably on his throat and his slim loins, and the fiery light in his brain went out in a flame of indignation, amazed that it in turn should suffer the fate which it had so continually and so implacably inflicted.
The Gray Visitor was already hungry again by this time, for an owl's digestion is astonishingly swift. He made a good meal, therefore, upon the flesh of the mink, though that flesh is so tough, so stringy, and so rank that few other flesh-eaters will deign to touch it unless in the extremity of famine. Then he went to sleep again, for he had long arrears to make up, and the hot glow of afternoon was still heavy on the reaches of sea and grass.
[Illustration: "And the fiery light in his brain went out."]
But just after sunset, when the glow had faded, and the first thin wave of lilac and amber came washing coolly over the wide landscape, and the blossoms gave out new scents at the touch of the dew, and the night-hawks twanged in the pale green upper heaven, then the Gray Visitor awoke to eager activity. He floated upward from out his covert like a ghost from a pool, circled over it twice, and flew off to those high and lonely treetops which he had marked in the earlier part of the day.
In the nearest tree, not far from the top, was what looked like an immense accumulation of dead sticks. To the Gray Visitor, coming from a region so far north that there were no tall treetops, this dark mass had no significance. In his world of the Arctic barrens nothing of the nature of a nest would ever be built in such an exposed position, where the first icy hurricane screaming down from the Pole would rip it to shreds. Therefore it never occurred to him that the clumsy platform of dead sticks was the nest of a pair of blue herons. In fact, he had no idea that any such creature as a blue heron existed. He flew noiselessly to the very top of the tree and perched there some ten or a dozen feet above the dusky platform of sticks.