The boys hurried from Car Three; that is, Phil did, Teddy
lagging behind.

"Over that way," he directed.

Phil crawled under a freight car to take a short cut, and ran
lightly across the railroad yards. The boys passed the station;
then, crossing several switches, they beheld a big, yellow car
looming up faintly under the lights of the station.

"It is an advertising car," breathed Phil. "I wonder whose it
can be?"

"You can search me," grumbled Teddy. "Guess I'll go back to
bed now."

"You wait until I tell you to go back," commanded Phil.
"Keep quiet, now."

The Circus Boy crept up to the car with great caution. The light
was so faint, however, that he was obliged to go close to it
before he could read the letters on the side of it. Even then he
had to take the letters one by one and follow along until he had
read the length of the line.

"Barnum and Bailey's Greatest Show on Earth," was what Phil
Forrest read, and on the end of the car a big figure "4."

"Car Four," he muttered. "Here's trouble right from the start.