The young inventor got back to find a bigger crowd than ever around his airship. But Koku and the others had kept them at a distance.
With the government agent aboard Tom sent his craft into the air at dusk, the crowd cheering lustily. Then, with her nose pointed toward the St. Lawrence, the Falcon was on her way to do a night patrol, and, if possible, detect the smugglers.
It was monotonous work, and unprofitable, for, though Tom sent the airship back and forth for many miles along the wonderful river that formed the path from the Great Lakes to the sea, he had no glimpse of ghostly wings of other aircraft, nor did he hear the beat of propellers, nor the throb of motors, as his own noiseless airship cruised along.
It came on to rain after midnight, and a mist crept down from the clouds, so that even with the great searchlight flashing its powerful beams, it was difficult to see for any great distance.
"Better give it up, I guess," suggested Mr. Whitford toward morning, when they had covered many miles, and had turned back toward Logansville.
"All right," agreed Tom. "But we'll try it again to-morrow night."
He dropped his craft at the anchorage he had
