"They probably have something to do with the naval maneuvers."

At this moment another group of ten men passed, and there was no doubt of the fact that they carried guns.

"I guess it is the naval maneuvers," asserted Tom.

Boom! came the sound of another shot.

"That's queer," said Tom. "What do you suppose it is?" He opened the window and listened. "Do you hear it?" he asked Harry, who admitted that he could also hear a rattling, scraping noise as though drums were being beaten far away or as though a handful of peas had been thrown against a pane of glass.

Tom leaned further out of the window in time to see a bicycle rider stop in front of the Post Office, take a big sheet of paper, moisten it with a large brush, and stick it on the wall near the entrance; then he rode off. Tom shut the window, for the fog seemed to be getting thicker and thicker, and now, in the pale light of approaching dawn, it was almost impossible to recognize the yellow spots of light on the lamp-posts. By this time Johnny had awakened and they all had some tea together.

They were interrupted by a fourth messenger boy, who entered the room at this moment and exclaimed:

"That's a great scheme of Admiral Perry's, and the fog seems to have helped him a lot. What do you think? He has surprised San Francisco. There's a notice posted downstairs stating that the Japanese have taken possession of San Francisco and that the Japanese military governor of San Francisco asks the citizens to remain quiet or the city will be bombarded from the harbor by the Japanese fleet."

"Perry is a great fellow, there's no use trying to fool with him," said Tom. "San Francisco surprised by the Japs—that's a mighty fine scheme."

Outside some one was tearing up the stairs two at a time, doors banged noisily, and several bells rang. "Somebody's in a h—- of a hurry," said Harry; "we'll have something to do in a minute."