The skin of his body was extremely white up to the brown line of his neck, and the angry crinkled spots looked the more vivid against it.

From above I could see that there was a corresponding pucker in the back at one place, but not at the other.

Inexperienced as I was, I could tell what that meant.
Two bullets had pierced his chest; one had passed through it, and the other had remained inside.
But suddenly he staggered up to his feet, and pulled his shirt to, with a quick suspicious glance at us.
"What have I been doing ?" he asked.

"I've been off my head.

Take no notice of anything I may have said.