Oh, the triumph of this final achievement! That engine went into position with the docility of a lamb. The chassis framework might have been its intended resting-place from the very commencement. It bedded down on the wooden frame snugly, hugging the timber. The bolt holes matched beautifully with those bored by Clive perhaps a week before, calling shouts of approval from his comrades. And when the hoisting rope was thrown off, and the sheer legs removed, there the engine was in position.

"And the wheels don't even feel the weight. Look. See if they do," cried Clive.

"A bit wobbly, eh?" suggested Hugh grudgingly, pushing the chassis from side to side, when it certainly had what might be described as freedom of movement. "Just a bit, eh? Still, that don't matter. Make her run all the better. But I'm glad she hasn't springs. She'd fairly roll herself over if she had them."

"But the back part's as steady as a rock," reported Clive enthusiastically. "Don't rock. Not a bit. Anyway, she runs forward and backward easily. By George! That's a bother!"

"What? You make a fellow ask such heaps of questions," grumbled Hugh, dismayed himself at the sudden fall in Clive's features.

"We've forgotten something else, and the bally thing's frightfully important."

Hugh gaped; Bert looked somewhat amused. To tell the truth, though glad always to lend a helping hand, he looked upon all this unnecessary work as a species of madness.

"You'll have to sweat at things like this when you're older," he declared. "No one's going to let you live at home and walk about doing nothing. You won't have time for games, and this sort of thing'll keep you from morning to evening—that is, if you take up engineering. Then why not make use of the good times and freedom now and play cricket?"

That had led to a somewhat animated discussion on the subject and seriousness of games as compared with mechanics till Hugh and Bert were within an inch of a struggle. But that was in the past. The plot they had so recently discussed, and the pit they had dug for the downfall of young Rawlings, had drawn the bonds of friendship more closely together. So Bert changed his expression of amusement to one of concern.

"What's the jolly thing?" he asked. "It looks complete—in fact, ripping. There's an engine and wheels and steering gear and frame. What more do you want? Ah! Got it! There's nothing there with which to cool the engine. Well, you two are precious mugs! Just fancy, taking all the sweat to mount an engine and then forgetting such an important matter!"