George Albert Smith says that Joseph visited mound with Zelph's skeleton.
George Albert Smith, "History of George Albert Smith," MS 1322, Church History Library
1834. . .
June 2nd. . .Some of us visited a mound <on a bluff> about 300 feet high & dug up some bones, which excited deep interest among the Brethren. Joseph The Prophet President & some many others visited the mound on the following morning, a notice of which is published in this History of Joseph Smith.