At Mitya’s urgent request that he would take him to Lyagavy at once, and by so doing "save him, so to speak," the priest agreed, after some demur, to conduct him to Suhoy Possyolok; his curiosity was obviously aroused.
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.