The Deeds of the Disturber

This is an okay book written by Elizabeth Peters. Amelia and her husband plan to stay in England during the summer of 1896. Her brother asks her to watch over his children, Percy and Violet while he visits another country. When a night watchman mysteriously dies in front of a mummy at the British Museum, Amelia shows up wielding her parasol. Someone is posing as an ancient priest, but the family has trouble trying to catch the prankster.

This is the fifth novel in the series. This is the only story which takes place entirely in England. The title refers to the ancient Egyptian Hymn to Osiris.