Holmes works as a detective for twenty-three years, with physician John Watson assisting him for seventeen.[16] They were roommates before Watson's 1887 marriage and again after his wife's death. Their residence is maintained by their landlady, Mrs. Hudson. Most of the stories are frame narratives, written from Watson's point of view as summaries of the detective's most interesting cases. Holmes frequently calls Watson's writing sensational and populist, suggesting that it fails to accurately and objectively report the "science" of his craft: