He and Amster had hurried out into the raw chill of the night,
reaching the spot of the first discovery in about ten or fifteen
minutes. Muller found nothing new there. But he was able to
discover in which direction the carriage had been going. The hoof
marks of the single horse which had drawn it were still plainly to
be seen in the snow.

"Will you follow these tracks in the direction from which they have
come?" he asked of Amster. "Then meet me at the station and report
what you have seen."

"Very well, sir," answered the workman. The two men parted with a
hand shake.

Before Muller started on to follow up the tracks in the other
direction, he took up one of the larger pieces' of glass. "Cheap
glass," he said, looking at it carefully. "It was only a hired cab,
therefore, and a one-horse cab at that."

He walked on slowly, following the marks of the wheels. His eyes
searched the road from side to side, looking for any other signs
that might have been left by the hand which had thrown the package
out of the window. The snow, which had been falling softly thus far,
began to come down in heavier flakes, and Muller quickened his pace.
The tracks would soon be covered, but they could still be plainly
seen. They led out into the open country, but when the first little
hill had been climbed a drift heaped itself up, cutting off the
trail completely.

Muller stood on the top of this knoll at a spot where the street