Doc Identify Bullet

There had apparently been four rapid-fire guns. They were situated on the four sides of the pyramid. So well screened were the weapons that no trace of them or the operators could be seen.

Doc shoved his friends, as well as King Chaac and the Princess Monja, down in the shelter of the large images on the pyramid top.

Not a moment too soon! Lead stormed the spot where they had been. Rock chips showered off the images. One big, long-nosed likeness even toppled over. Flattened bullets fell about them.

Doc picked up one of those lead blobs, studied it. His brain, replete with ballistics lore, instantly catalogued the bullet.

"This is not the caliber of our guns!" he declared. "That means they haven't seized our weapons. So some one has brought in machine guns from the outside!"

The adventurers looked at each other. They knew the answer to the question. The murderer of Doc's father had brought in the guns!

- The Man of Bronze (1933) Chapter 18