The first act of Nicholas, when he became a rich and prosperous merchant, was to buy his father’s old house.
Secondly, that by some will or settlement—certainly by some instrument in writing, which must contain the young lady’s name, and could be, therefore, easily selected from others, if access to the place where it was deposited were once secured—she was entitled to property which, if the existence of this deed ever became known to her, would make her husband (and Ralph represented that Nicholas was certain to marry her) a rich and prosperous man, and most formidable enemy.
There are no more uses of "prosperous" in the book.
Show samples from other sources
She owns a prosperous law firm.
But in spite of these disadvantages, he had begun even in his father’s lifetime to lay the foundations of a prosperous future.