From Notes and Queries 188:

Anecdote of Dutens_ (Vol. vii., pp. 26. 390.).--

"Lord Lansdowne at breakfast mentioned of Dutens, who wrote _Memoires
d'un Voyageur qui se repose_, and was a great antiquarian, that, on his
describing once his good luck in having found (what he fancied to be) a
tooth of Scipio's in Italy, some one asked him what he had done with
it, upon which he answered briskly: 'What have I done with it? Le
voici,' pointing to his mouth; where he had made it supplemental to a
lost one of his own."--Moore's _Journal_, vol. iv. p. 271.

E. H. A.