returning to lalande's parents, his father pierre, who ran a post office and traded in tobacco in bourg-en-bresse, had married marie-anne-gabrielle monchinet.

This is all lower case. Can you fix that?
Returning to Lalande's parents, his father Pierre, who ran a post office and traded in tobacco in Bourg-en-Bresse, had married Marie-Anne-Gabrielle Monchinet.