"Then there's only one thing to do—whoop her up until the mummies turn over."

"I guess you are right."

Dan uttered a loud hello. There was no answer. Sam shouted, with no better result.

"Sam, we've been left alone in the dark this time—we're lost in the Great Pyramid."

Meanwhile the other bluejackets had finished their tour and had emerged into the bright sunlight.

While taking up a collection to settle with the guide, Spunk McGraw, a friend of the Battleship Boys, suddenly looked up.

"See here, where's that red-headed boy?" he demanded.

"He's hidden so he won't have to hand out when the plate's passed," answered a joking voice.

"And Dan Davis is missing, too," said McGraw, with a scared look on his face.

"They're not going back on the train," one of the jackies volunteered. "They said they were going back part way on the camels."