From daybreak to dusk he was cooped within a little insignificant room which looked out upon a little insignificant street.

His window, however, though it promised little diversion, was his one resource.

Gaydon was a man of observation, and found a pleasure in guessing at this and that person's business from his appearance, his dress, and whether he went fast or slow.

So he sat steadily at his window, and after a day or two had passed he began to be puzzled.

The moment he was puzzled he became interested.