The only fly in the ointment of my peaceful days was Mrs. Cavendish's extraordinary, and, for my part, unaccountable preference for the society of Dr. 
Mrs. Cavendish had  terrible friends. 
mnli hypothesis: Mrs. Cavendish had  terrible friends.  premise: The only fly in the ointment of my peaceful days was Mrs. Cavendish's extraordinary, and, for my part, unaccountable preference for the society of Dr. 