He swung round and saw the bombing machine diving straight for the earth with the German scout on his tail. Tam followed in a dizzy drop. Three thousand feet from earth the bombing machine turned a complete somersault and Tam's heart leaped into his mouth. He banked over to follow the pursuing German and in the brief space of time which intervened before his enemy could adjust his direction to cover pilot and gunner, Tam had both in line. His two guns trembled and flamed for four seconds and then the German dropped straight for earth and crashed in a flurry of smoke and flying débris. Tam looked backward. The bomber had pancaked and was drifting to a landing; the squadron was out of sight. Tam glided to the broad field before the hospital. "I knew it was you--I knew it was you!" He looked down from the fuselage at the bright upturned face. "Oh, aye, it was me," he admitted, "an' A'm michty glad ye was lookin', for A' was throwin' stunts for ye." He was on the ground now, loosening the collar of his leather jacket. He stepped clear of the obstructing planes of his machine and looked anxiously toward the gentle slopes of the ridge on which the bomber had landed. "Thank the guid Lord," he said and sighed his relief. He was making a careful inspection of his own machine preparatory to returning to the aerodrome when the girl came running across the field to say good-by. "I can't tell you just how I feel--how grateful I am. My brother says you saved his life. He was in that other machine, you know." "A' knew it," said Tam. "'Twas a graund adventure, like you read aboot in books--'twas ma low, theatrical mind that wanted it so. Good-by, young lady." "Till to-morrow--don't forget you're lunching with me at the Café St. Pierre." Tam smiled gravely. "A'm afraid ye'll have to postpone that lunch," he said, "till--" "Till to-morrow," she interrupted firmly, and Tam flew back to the aerodrome without explaining. He was feeling the reaction of the morning's thrill, and when he landed he had no answer to make to the congratulations which were poured upon him. He made his way to his hut. His batman was cleaning a pair of boots and stood stiffly as Tam entered. "That'll do, Angus, ye may go," he said, and then saw the folded coat upon his bed. "Ah, ye got it back, did ye--well, A'll no' be needin' it." He picked up the coat and frowned. "This is no' mine, Angus." "Your tunic is in the box, sir--this is the one the officers had made for you. They wanted your other tunic for the measurements." Tam looked at the man. "Yon's an officer's tunic, Angus," he said; "an' why do ye say 'sir' to me?" Angus beamed and saluted with a flourish. "It's in General Orders this morning, sir--you've got a commission, an' Mr. Brandspeth says that the mess will be expectin' you to lunch at one-thirty." Tam sat down on the bed, biting his lip.