Solomon H. Hale remembers Joseph getting upset when boys were playing with mummies.
Solomon H. Hale, in Heber Q. Hale, Bishop Jonathan H. Hale of Nauvoo: His Life and Ministry (Salt Lake City, UT: n.p., 1938), 196
"And I have always carried clearly in memory—somewhat to my embarrassment—certain cautious and uninvited visits to an upstair room in his home, where I would take boys to see the 'mummies.' They were set upright in a kind of cabinet against the wall, behind a curtain. I can see to this day the startled looks on the boys' faces when I would jerk the curtain to one side and reveal those awful looking mummies. But one day the Prophet Joseph caught us at it, and gave us a well-deserved reprimand. We never did it again." (These were the mummies, four in number, which the Prophet purchased from a Mr. Michael H. Chandler, July, 1835. They were brought from the catacombs of Egypt and with them were two rolls of papyrus containing, among other writings, the book of Abraham, which the Prophet translated and published in our "Pearl of Great Price.")