He had to pull alongside the caboose, grab one of its side ladders, and jump before the race car lost speed and fell back. He overtook the train, steered alongside it. A car length ahead, he saw a telegraph pole that was set closer than the others to the rail. There was no room to squeeze between it and the train.

Chapter 10.

BELL GUNNED THE ENGINE, SEIZED THE CABOOSE'S LADDER IN his right hand, and jumped.

His fingers slipped on the cold steel rung. He heard the Packard Wolf crash into the telegraph pole behind him. Swinging wildly from one arm, he glimpsed the Wolf tumbling down the embankment and fought with all his strength to avoid the same fate. But his arm felt as if it had been ripped out of his shoulder. The pain tore down his arm like fire. Hard as he tried to hold on, he could not stop his fingers from splaying open.

He fell. As his boots hit the ballast, he caught the bottom rung of the ladder with his left hand. His boots dragged on the stones, threatening his precarious grip. Then he got both hands on the ladder, tucked his legs up in a tight ball, and hauled himself up, climbing hand over hand, until he could plant a boot on the rung and swing onto the rear platform of the caboose.

He threw open the back door and took in the interior of the caboose in a swift glance. He saw a brakeman stirring a vile-smelling stewpot on a potbellied woodstove. There were tool lockers, trunks on either side with hinged tops doubling as benches and bunk beds, a toilet, a desk stuffed with waybills. A ladder led up to the cupola, the train's crow's nest, where the crew could observe the string of boxcars they were trailing and communicate by flag and lantern with the locomotive.

The brakeman jumped as the door banged against the wall. He whirled around from the stove, wild-eyed. "Where the heck did you come from?"

"Bell. Van Dorn investigator. Where's your conductor?"

"He went up to the locomotive when we took on water. Van Dorn, you say? The detectives?"

Bell was already climbing the ladder into the cupola from where he could see the train cars stretching ahead. "Bring your flag! Signal the engineer to stop the train. A saboteur is riding in one of the freight cars."

Bell leaned his arms on the shelf in front of the windows and watched intently. Fifty cars stretched between him and the smoke-belching locomotive. He saw no one on the roofs of the boxcars, which blocked his view of the low-slung gondolas.

The brakeman climbed up beside Bell with a flag. The stew smell was worse in the raised cupola. Or the brakeman hadn't bathed recently. "Did you see anyone stealing a ride?" Bell asked.

"Just one old hobo. Too crippled to walk. I didn't have the heart to roust the poor devil."

"Where is he?"