“Shall we shoot?” questioned Elfreda anxiously.

“No, not yet,” answered Grace briefly.

“I think they are going to circle the camp,” volunteered Lieutenant Wingate.

“We will wait until they have made the circuit, then let them have it, unless you have a better plan, Lieutenant. Every one keep down as low as possible and take no chances,” she called to Nora, Anne and Emma. The three defenders assumed a crouching attitude and waited.

The attackers were howling and shooting at the same time, their bullets being fired so low that Grace feared some of her party would be hit. Horses and men out there in the valley were dim shadows, unreal to the little group of defenders, but real enough when it came to the rifles that were sending out darting flashes of fire and whistling bullets.

As the riders completed their first circuit of the camp and drew in closer, Lieutenant Wingate, without waiting for further orders, threw the rifle to his shoulder and fired. A few seconds later, Grace followed with a shot, then Miss Briggs pulled the trigger of her weapon.

“Keep it up!” urged Hippy. “Follow them all the way around with your fire, and take advantage of all the cover you can find.”

The Overton outfit was in the fight in deadly earnest now. Darting here and there to keep the attackers in view, the two girls and Lieutenant Wingate continued to fire their rifles until at least two shoulders were aching from the kick of the weapons.

The spirited defense of the three plucky campers must have amazed their assailants, for the men drew off a little and cut a wider circle on the next circuit of the camp, but still keeping up and receiving a rapid fire all the way around.

“Look out! They’ve changed their tactics,” warned Hippy. “They’re charging us, the fools! Hold fire till they’re in easy reach, then give it to ’em! Just let it slowly peter out now. Don’t cut it off all at once.”