NK on HP's seer stone.
"Newel Knight's Journal," in Scraps of Biography: Tenth Book of the Faith-Promoting Series: Designed for the Instruction and Encouragement of Young Latter-Day Saints (Salt Lake City: Juvenile Instructor Office, 1883), 64
On my arrival I found Brother Joseph in great distress of mind on account of Hyrum Page, who had managed to get up some dissension of feeling among the brethren by giving revelations concerning the government of the Church and other matters, which he claimed to have received through the medium of a stone he possessed.