But then it had all come; right in the end, for two mysterious children had suddenly appeared from the land beyond the world’s end and had rescued him so that he came home to Narnia and had a long and prosperous reign.
There are no more uses of "prosperous" in the book.
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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.