I could see he was working rapidly with his hands. When he returned to me the sweat was heavy on his forehead.
"I disconnected it," he said, "and just in the nick of time. The soldier was clumsy. He intended it for our comrades, but he didn't give it enough time. It would have exploded prematurely. Now it won't explode at all."
Everything was happening rapidly now. Across the street and half a block down, high up in a building, I could see heads peering out. I had just pointed them out to Hartman, when a sheet of flame and smoke ran along that portion of the face of the building where the heads had appeared, and the air was shaken by the explosion. In places the stone facing of the building was torn away, exposing the iron construction beneath. The next moment similar sheets of flame and smoke smote the front of the building across the street opposite it. Between the explosions we could hear the rattle of the automatic pistols and rifles. For several minutes this mid-air battle continued, then died out. It was patent that our comrades were in one building, that Mercenaries were in the other, and that they were fighting across the street. But we could not tell which was which—which building contained our comrades and which the Mercenaries.
By this time the column on the street was almost on us. As the front of it passed under the warring build-
