by Jack London
He strolled to the corner and glanced up and down the intersecting street, but saw nothing save the oases of light shed by the street lamps at the successive crossings. Then he strolled back the way he had come. He was a shadow of a man sliding noiselessly and without undue movement through the semi darkness. Also he was very alert, like a wild animal in the jungle, keenly perceptive and receptive. The movement of another in the darkness about him would need to have been more shadowy than he to have escaped him.
In addition to the running advertisement of the state of affairs carried to him by his senses, he had a subtler perception, a _feel_, of the atmosphere around him. He knew that the house in front of which he paused for a moment, contained children. Yet by no willed effort of perception did he have this knowledge. For that matter, he was not even aware that he knew, so occult was the impression. Yet, did a moment arise in which action, in relation to that house, were imperative, he would have acted on the assumption that it contained children. He was not aware of all that he knew about the neighborhood.