The blow was struck from immediately behind, and yet was upon the left side.

Now, how can that be unless it were by a left-handed man?
He had stood behind that tree during the interview between the father and son.

He had even smoked there.

I found the ash of a cigar, which my special knowledge of tobacco ashes enables me to pronounce as an Indian cigar.

I have, as you know, devoted some attention to this, and written a little monograph on the ashes of 140 different varieties of pipe, cigar, and cigarette tobacco.