…to herself, that she should want him to play at piquet of an evening, while Miss Dashwood was above with her sister, &c. she urged him so strongly to remain, that he, who was gratifying the first wish of his own heart by a compliance, could not long even affect to demur; especially as Mrs. Jennings’s entreaty was warmly seconded by Mr. Palmer, who seemed to feel a relief to himself, in leaving behind him a person so well able to assist or advise Miss Dashwood in any emergence.
There are no more uses of "demur" in the book.
Show samples from other sources
When the sheriff apprehended him for grave-robbery and gold-hoarding, Mr. Fink demurred on the theory that if his own grandfather wasn’t his, whose was he?
Harper Lee -- Go Set a Watchman
"I know how full Jacqueline keeps your schedule," I demur.