On 23 August 1716, carrying chests of silver, Dubocage returned to Le Havre after his long voyage to the Chinese city of Amoy, now Xiamen. His social success followed immediately: he set up as a shipowner, purchased a number of properties and became one of Le Havre's most notable citizens. After his death in 1727, at the age of 51, his widow and son took over his business affairs. His family was granted a title in 1753, and Michel Joseph Dubocage de Bléville, son of the captain of the Dauphine, became mayor of Le Havre that same year. In less than two generations, the Dubocage family emerged as one of the richest and most eminent families in one of the greatest port cities of France – and all thanks to long-haul maritime trading.
