mat

The soldier made them all wipe their feet upon a green mat before entering this room, and when they were seated he said politely:

While I am hammering on the anvil, you sleep on the mat; and when I begin to eat after my toil, you wake up and wag your tail for food.

Douglas defended himself with the hammer, he might have left his mark upon the murderer before he dropped it on the mat.

Then either in cold blood or in the course of a struggle—Douglas may have gripped the hammer that was found upon the mat—he shot Douglas in this horrible way.