Seating himself down upon the camp-bed, he let his eyes roam round everywhere, hoping that his life’s training would enable him to pick out something that needed some unusual explanation.
And pick out something he very soon did—quite a good-sized area of the sand towards the far end of the shed was of a different shade from that of the sand elsewhere. It looked whiter and cleaner. Striding over to it at once, the impression was lost directly he approached near, with the sand then looking no different from anywhere else, and he had to go back to the other end of the shed again to note exactly where it was.
Stirring over the surface vigorously with his foot, quite a number of sand-beetles at once came to light. He bent down close and smelt hard, but in an instant had straightened himself u
