When Dave’s revolver was not barking, his sword was in action, and his arms fairly ached with the labor of pushing away ladder after ladder. Hardly one of Dave’s men was less occupied. Many of the Chinese had dropped the rifle for the long spear, or else for the keen, two-edged sword. American blood flowed in that quarter of an hour.

Boom! Out of the darkness came a trail of fire. Bang! A shell from the “Castoga” exploded among the nearest buildings on the river side beyond the yamen compound. In another moment flames were leaping upward from a flimsy house in which a shell had exploded.

Boom! Other shells began dropping about, on three sides of the compound. Soon a score of native houses were in flames, the light showing to the marksmen on the parapets just where to “find” their yellow assailants.

But no shell was fired over the yamen. Plainly the “Castoga’s” gunners feared that they might drop a shell into the compound itself.

On three sides the flames of the conflagration made the surroundings nearly as bright as in daytime. The men on the ramparts could now see excellently, and aim accordingly.

At the same time the attack by ladders ceased, for now the laddermen were too plainly visible and could be killed with ease.

“Great work, that done by the shells!” chuckled Danny Grin.

“Yes,” nodded Dave, “but I wish we could have the same kind of illumination to the southward. Withdraw enough men from the other three sides, Dan, to strengthen the southern rampart sufficiently.”

The machine guns barking out anew, and with increased deadliness, the thousands of fanatical Chinese, now finding themselves too much in the spotlight, soon withdrew to a distance. From the darkness on the farther sides of the fires, however, they still kept up a sniping fire.

“Watch from the south wall, Dan,” urged Ensign Darrin. “I’m going down into the compound to see how it fares with our wounded.”