Brigham claims Emma destroyed the original manuscript of D&C 132.
Brigham Young, Speech, August 29, 1852, in Journal of Discourses, 26 vols. (Liverpool: Asa Calkin; London: Latter-Day Saints' Book Depot, 1859), 6:
You heard brother Pratt state, this morning, that a revelation would be read this afternoon, which was given previous to Joseph's death. It contains a doctrine a small portion of the world is opposed to; but I can deliver a prophecy upon it. Though that doctrine has not been practiced by the Elders, this people have believed in it for years.
The original copy of this revelation was burnt up. William Clayton was the man who wrote it from the mouth of the Prophet. In the meantime, it was in Bishop Whitney's possession. He wished the privilege to copy it, which brother Joseph granted. Sister Emma burnt the original. The reason I mention this is because that the people who did know of the revelation suppose it is not now in existence.