In 1835 Joseph Smith began translating some ancient Egyptian papyri that he had obtained from an exhibitor passing through Kirtland, Ohio. He soon announced, “Much to our joy [we] found that one of the rolls contained the writings of Abraham.”[1] While we do not know how much the Prophet translated, we do know that some of his translation was published in serial form and eventually canonized as the Book of Abraham in the Pearl of Great Price. For nearly one hundred years, it was thought that all these papyri had eventually made their way to the Wood Museum in Chicago, where they were destroyed in the Great Chicago Fire of 1871.
Further reading: https://rsc.byu.edu/archived/egyptian-papyri-and-book-abraham-some-questions-and-answers