translate English to French: By the mid-19th century, Saint John had developed from a bustling port to a thriving industrial centre where factories, mills, and other manufactories dotted the landscape.
Au milieu du XIXe siÃ¨cle, Saint John n'est plus seulement un port achalandÃ©, mais est devenue un centre industriel florissant dont le paysage est parsemÃ© d'usines, de scieries et d'autres industries.