CHW remembers seeing mummies in JS's home as a girl in Nauvoo.
Catherine Hulet Winget, "Autobiography," 1905, in Ida A. Isaacson, "They Knew the Prophet Joseph Smith," Relief Society Magazine 53, no. 7 (July 1966): 507
While there, I went to the house of the Prophet Joseph Smith. He had three Egyptian mummies in his room. I saw them standing against the wall.
The original scan of Catherine Hulet Winget's "Autobiography" isn't available for public research.