160. 4-5. Au troisième: French, literally, "on the third," but
the meaning is the fourth floor, because the count is begun above the
ground floor; Faubourg St. Germain: an aristocratic section of
Paris.
160. 15-16. Monsieur G----: introduced in "The Murders in the
Rue Morgue."
164. 3. Hotel: in French usage, a dwelling of some
pretension,--a mansion.