From the text:
Tom lifted up his eyes and beheld a great black man seated directly opposite him, on the stump of a tree.
"....... the stranger was neither negro nor Indian. It is true he was dressed in a rude Indian garb, and had a red belt or sash swathed round his body; but his face was neither black nor copper-color, but swarthy and dingy, and begrimed with soot, as if he had been accustomed to toil among fires and forges. He had a shock of coarse black hair, that stood out from his head in all directions, and bore an axe on his shoulder."
He sounds frightening to me.