JAMES DASHWOOD CAUGHT UP with Isaac Bell one hundred and seventy miles west of Chicago in a rail yard near the Peoria Fairgrounds on the bank of the Illinois River. It was a sweltering, humid evening—typical of the Midwestern states, Bell informed the young Californian—and the smell of coal smoke and steam, creosote ties, and the mechanicians’ suppers frying, hung heavy in the air.

The support trains were parked cheek by jowl on parallel sidings reserved for the race. Bell’s was nearest the main line but for one other, a four-car special, varnished green and trimmed with gold, owned by a timber magnate who had invested in the Vanderbilt syndicate and had announced that he saw no reason not to ride along with the rolling party just because his entry smashed into a signal tower. After all, Billy Thomas was recuperating nicely, and was a true sportsman who would insist the show go on without him.

Whiteway’s yellow six-car Josephine Special was on the other side of the Eagle Special, and Bell had had his engineer stop his train so that the two flying-machine support cars stood next to each other. Both had their auto ramps down for their roadsters, which were off foraging for parts in Peoria hardware stores or scouting the route ahead. Laughter and the ring of crystal could be heard from a dinner party that Preston Whiteway was hosting.

Dashwood found Bell poring over large-scale topographic maps of the terrain across Illinois and Missouri to Kansas City, which he had rolled down from his hangar-car ceiling.

“What have you got, Dash?”

“I found a marine zoology book called Report on the Cephalopods. Squid and octopuses are cephalopods.”

“So I recall,” said Bell. “What do they have in common?”

“Propulsion.”

Bell whirled from the map. “Of course. They both move by spurting water in the opposite direction.”

“Squid more than octopus, who tend more toward walking and oozing.”

“They jet along.”

“But what sort of motor would my fishermen be comparing them to?”

“Platov’s thermo engine. He used the word ‘jet.’” Bell thought on that. “So your fishermen overheard Di Vecchio accuse Celere of a being a gigolo because he took money from a woman to buy some sort of engine at a Paris air meet. A jet motor. Sounds like Platov’s thermo engine.”

A heavy hand knocked on the side of the hangar car, and a man stood perspiring copiously at the top of the ramp. “Chief Investigator Bell? I’m Asbury, Central Illinois contract man.”

“Yes, of course. Come on in, Asbury.” The contractor was a retired peace officer who covered the Peoria region on a part-time basis, usually for bank robbery cases. Bell offered his hand, introduced “Detective Dashwood from San Francisco,” then asked Asbury, “What have you got?”