Statistics for occurrence #1 of “de St. Castin” in chapter 3 of George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 3, 15th edition.:

...e most important settlement of France. To protect it, the Jesuits Vincent and James Bigot collected a village of Abenakis on the Penobscot; and a flourishing town now marks the spot where the baron de St. Castin , a veteran officer of the regiment of Carignan, established a trading fort. Would France, it was said, strengthen its post on the Penobscot, occupy the islands that command the Gulf of St. Lawrence...
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De St. Castin 2 2 2 2 0 user votes

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