But the light of his lantern flashed onto the ground at the side of the track—a loose, gravelly soil mixed with fragments of chalk—and from thence to the soles of the inspector's boots, which were displayed as he knelt by the rail.
"You observe, Jervis?" he said in a low voice, and I nodded. The inspector's boot-soles were covered with adherent particles of gravel and conspicuously marked by the chalk on which he had trodden.
"You haven't found the hat, I suppose?" Thorndyke asked, stooping to pick up a short piece of string that lay on the ground at the side of the track.
"No," replied the inspector, "but it can't be far off. You seem to have found another clue, sir," he added, with a grin, glancing at the piece of string.
"Who knows," said Thorndyke. "A short end of white twine with a green strand in it. It may tell us something later. At any rate we'll keep it," and, taking from his pocket a small tin box containing, among other things, a number of seed envelopes, he slipped the string into one of the latter and scribbled a note in pencil on the outside. The inspector watched his proceedings with an indulgent smile, and then returned to his examination of the track, in which Thorndyke now joined.
