For a long time they saw nothing out of the ordinary.

Then Sam uttered a cry: "See! see! There is Grace! She is waving her handkerchief at us!" All looked in the direction indicated, and at a spot along the road where there was quite a cleared space they saw Grace Laning standing on a flat rock, waving frantically at them.

They had to make a circle, and then, with care, Dick brought the biplane down into the roadway.
"What is it, Grace ?" yelled Sam, as he leaped from his seat.

"Where are the others ?" "Oh, Sam!" moaned the girl, and then they saw that her hair was awry and her shoes were covered with dust.

"Oh, save them! Go after them at once!" And then she staggered forward and fainted in Sam's arms.
The three Rovers were greatly alarmed and for the moment did not know what to do.