He saw the conductor wave his arm at the engineer who was leaning out of the cab window, then the locomotive began to puff and the train to move.

While two cars went past him Pep stood uncertain, then with a scramble and a glad bark he sprang upon the rear platform of the third and last car. He went with such a rush that he nearly slid off on the other side, but he finally gained his footing, and crouched down beside the door.

Presently the train got up speed. The car swayed from side to side and he slipped and slid on the smooth floor. The train also made a great noise, which terrified him.

He was lonesome also, as there was no one to notice him out there alone in the dark. There certainly was a difference between traveling in a warm coach with one’s master, and slipping and sliding about on the rear platform, stealing a ride like an ordinary tramp.

After about half an hour, which seemed much longer to Pep, the train entered the long, dark underground passage which he had always noticed just before they reached the great city. They were almost there.

When the train at last stopped, Pep slid down from his platform and ran along towards the engine, but his master was too quick for him. When he reached the car where he had seen him enter, he was walking rapidly down the platform, almost running in fact. A taxi driver was carrying his master’s suit case and they seemed much excited.

The official at the gate saw they were in a great hurry so did not detain them and Pep slipped through between his legs, while he was looking at the ticket of a passenger who was just entering.

Pep had all he could do to keep his master’s legs in sight and not confuse them with some other man’s legs. To him the place was all legs; legs and skirts hurrying this way and that. Electric gongs were ringing, men and women were calling to one another, the megaphone man was shouting out the trains, and engines were thundering in the train sheds.

“We’ve got just forty minutes to make the boat,” said Pep’s master as he scrambled into the taxi and the driver hurled the suit case in after him.

“Can you make it?”