Ashworth Hall By Anne Perry

(Used, paperback)
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(Charlotte & Thomas pit #17)
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When a group of powerful Irish Protestants and Catholics gather at a country house to discuss Irish home rule, contention is to be expected. But when the meeting's moderator, government bigwig Ainsley Greville, is found murdered in his bath, negotiations seem doomed. Unless Superintendent Thomas Pitt and his wife, Charlotte, can root out the truth, simmering hatreds and passions may again explode in murder.