Mormon History, Dec 17, 1845. Wednesday.

[William Clayton Journal] ...Brother Lucian R. Foster is now appointed to keep the Records of the endowment. Margaret came with me to the Temple this morning and received her washing and anointing. She was washed by Sister Patty Sessions and anointed by Sister Mary Ann Pratt wife of Elder Parley P. Pratt one of the Twelve. I conducted her through the remaining ceremonies and also received her through into the upper or Celestial department. I feel grateful for this privilege and for all the blessings I receive from day to day for the mercies of the Lord to me are great and many of them. I instructed Brother [Lucien R.] Foster in regard to keeping the Record and in the evening assisted Elder Young and Kimball to collect a list of brethren to come here on Saturday . . .

[source: George D. Smith, An Intimate Chronicle; The Journals of William Clayton, Signature Books in association with Smith Research Associates, Salt Lake City, 1995, http://amzn.to/william-clayton]