“Very good, sir. Where is he working?”

“At home. He lives out Beverly way. Take a Beverly car and get off at Sandringham avenue. Walk north up the lane to the first bungalow.”

“Ever been there, sir?”

“No; but Kane’s sister has described the place to me. When you get there, try to hire out as an assistant, but in any case keep your eyes open and observe everything in sight. I’ll pay you extra for this work, according to the value of the information you obtain.”

“I understand, sir,” answered Tyler, wrinkling his leathery face into a shrewd smile; “I know how to work a game of that sort, believe me.”

In pursuance of this mission the little chauffeur came to the Kane residence that very afternoon. As he approached the bungalow he heard the sound of pounding upon metal coming from the canvas covered hangar; otherwise the country lay peacefully sunning itself. An automobile stood in the lane. On the front porch a woman sat knitting, but raised her head at the sound of footsteps. Tyler touched his cap, but there was no response. Looking at her closely he saw the woman was blind, so he passed her stealthily and tiptoed up the narrow path toward the hangar. The top canvas had been drawn back on wires to admit the air, but the entrance was closed by curtains. Tyler listened to the hammering a moment, and summoning his native audacity to his aid boldly parted the curtains and entered.

“Hello, Kane!” he called; then paused and took in the scene before him at a glance.

Stephen was at the bench pounding into shape an aluminum propeller-blade; a tall man with a drooping mustache stood near, watching him. A young girl was busily sewing strips of canvas. On its rack lay a huge flying machine—its planes spread, the motors in place, the running gear complete—seemingly almost ready for action.

But Tyler was not the only one with eyes. Kane paused with uplifted hammer and regarded the intruder with a frown of annoyance; Orissa stared in startled surprise; the tall man’s spectacles glittered maliciously.

“Burthon’s chauffeur!” he muttered; “I remember him.” Swiftly his long arm shot out, seized Tyler’s shoulder and whirled him around. The square toe of a heavy shoe caught the little man unprepared and sent him flying through the entrance, where he sprawled full length upon the ground.