However, his talents in astronomy were noticed by Joseph Jérôme Lalande, for whom he became a friend and proof-reader of the second edition of his book "L'Astronomie".
Namun, bakatnya dalam astronomi yang diperhatikan oleh Joseph Jérôme Lalande, yang kemudian menjadi teman dan pengoreksi cetakan edisi kedua dari bukunya "L'Astronomie".