Conversation so far:
What was Thompson like as a person?
He was plainly dressed, quiet, and observant.
What else was noticeable about his appearance?
His figure was short and compact.
Did he have any other distinguishing features?
his black hair was worn long all round, and cut square.
Are there any other interesting aspects about this article?
His complexion was of the gardener's ruddy brown.
Did he wear a beard?
CANNOTANSWER.
How did he wear his clothes?
was plainly dressed.

Question: What else was unique about his appearance?
Self-contained rewrite: Besides David Thompson's ruddy-brown complexion and plain clothes, what else was unique about Thompson's appearance?