"I warrant that if I were a renegade and had taken my plans to Berlin the German government would have snapped them up, either by fair means or foul. As it is, their agents have been giving me a deal of trouble.

"However, foiled in my patriotic efforts I determined to erect a private factory, build a really formidable battleplane and give a practical demonstration over the heads of the War Office. My first trouble was to find a suitable site. It had to be in a remote district, far from a prohibited military area, yet fairly accessible from the important industrial centres. I lighted upon this place, and found it answered my purpose.

"Everything I have to do single-handed. I dare not run the risk of getting mechanics to help, partly, as I said before, owing to the Factory Act restrictions, but more especially from a fear lest my ideas should be filched.

"And now the finished article lies in my grounds, ready for instant flight, except for one drawback——"

"The snow, I suppose," hazarded Dick.

"Does not affect it to any appreciable extent," rejoined Desmond Blake. "My battleplane does not require hard, level ground for a 'take-off.' It will rise almost perpendicularly. No, it is not the climatic elements. To be concise I need a couple of capable and willing helpers, and judging by what you have already told me, I think you fellows have sufficient patriotism to volunteer your services in that direction. Am I right?"

Dick gave his chum an enquiring glance. Athol, naturally cautious, knew that Dick would have jumped at the offer.

"Your tempting invitation needs thinking over," replied Athol. "We should——"

"Of course," agreed Desmond Blake. "Of course. Suppose you defer your decision until you have inspected my invention? You will, I feel sure, treat the subject as one of a highly confidential nature."

"Rather," agreed both lads simultaneously.