After examining the marks, Holmes finds signs of the presence of another man besides Charles and James, who he believes to be the murderer; the person is a tall, limping, left-handed man who smokes cigars.
Holmes finds signs of the presence of another man besides Charles and James. Holmes is examining the marks. He believes to be the murderer the presence of another man besides Charles and James. The person is a tall left-handed man. This is limping. This tall left-handed man smokes cigars. This is limping.