Most of it was familiar; but some new factors needed inspection.
The Master peered curiously at him.

Surely, this man was odd, unusual.
Most aviators, thus confronted by strange problems, would have grown loquacious, tried to exhibit their knowledge, asked questions, made much talk.

But Alden held his tongue.
A look of appreciation, of liking, came upon the Master's face.

It was just the suspicion of a look, for in all this strange man's life no great show of emotion ever had been permitted to mirror itself upon his countenance.

But still, the look was there.