Sunday prayer circle "in the upper room" of Smith's old home. ... and the participants "attended to ordinances" . Because of his recent conversion to polygamy, Hyrum Smith may have been the one who performed the sealing of Emma Hale Smith to Joseph Smith for time and eternity on this date. James Adams was also sealed to his first wife Harriet Denton Adams.
"... we administered to brother Joseph the same ordinances of Endowment, and of the holy priesthood which he administered unto us." Thus, this repeated the pattern established in May 1842 of endowing Smith the second day.
[Source: Quinn, D. Michael, The Mormon Hierarchy: Origins of Power, Signature Books, 1994, Appendex: Meetings and Initiations of the Anointed Quorum, 1842-45, http://amzn.to/origins-power]