This is the Muscrove estate in Somerset, as seen on page 88 of Persuasion, "Captain Wentworth was known to be at Kellynch, and Mr. Muscrove had called on him, and come back warm in his praise, and he was engaged with the Crofts to dine at Uppercross, by the end of the week." 

Austen, Jane. Persuasion, edited by Linda Bree, Broadview Press, 2004.