“I guess we’ve had our share of the rough along with the smooth,” he said briefly, but he was listening closely.
“What would you say to trying a voyage in the air?” was the question that the man of science suddenly launched at him without the slightest warning.
Nat glanced up from his steering amazed. The scientist met the lad’s gaze firmly.
“Well?” he demanded.
“I—I—upon my word, I don’t know,” stammered Nat.
For once in his life, the young leader of the Motor Rangers was fairly taken aback.
CHAPTER VII.
A STRANGE SAIL APPEARS.
“I am perfectly serious,” resumed Professor Grigg solemnly.
“The idea was such a new one that I admit it staggered me a bit,” explained Nat hastily.