Mormon History, Dec 4, 1845

[Anointed Quorum] The first Thursday evening prayer circle in the temple with Apostles Brigham Young, Heber C. Kimball, Orson Hyde, Parley P. Pratt, George A. Smith, John Taylor joining in the circle with High Priests John Smith, Isaac Morley, William W. Phelps, Orson Spencer, Joseph C. Kingsbury, Joseph Fielding, Lucien Woodworth, Reynolds Cahoon, and George Miller. Orson Spencer, rather than an apostle, "being mouth" .

[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]
[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]