We played a neat trick on them," chuckled the lieutenant.
"Don't crow," advised Emma Dean.

"It isn't daylight yet.

I will con-centrate.

I con-centrated all the time you were away, and you came back, didn't you ?" "'Con-centrate' on those ruffians and drive them away; 'con-centrate' on Tom Gray; 'con-centrate' on the Mystery Man--'con-centrate' on anybody, but for the love of Mike don't let loose any of that 'imponderable quantity' on me," begged Lieutenant Wingate.
Hippy advised the girls to lie down on their blankets and try to sleep, saying that he would keep awake and watch at the cave entrance, but none of them felt the slightest desire for sleep, especially when the rifle fire opened up again.

They wondered if the attackers were shooting at shadows.