Below is an excerpt from The Life of Heber C. Kimball. More can be read here: http://www.signaturebookslibrary.org/heber.htm
Also available is the History of the Life of Oliver B. Huntington: http://www.signaturebookslibrary.org/huntington.htm
...During the ceremonies of the dedication, an angel appeared and sat near President Joseph Smith, Sen., and Frederick G. Williams, so that they had a fair view of his person. He was a very tall personage, black eyes, white hair, and stoop shouldered; his garment was whole, extending to near his ankles; on his feet he had sandals. He was sent as a messenger to accept of the dedication. The Priesthood was organized according to the proper order. During the whole of the dedication each quorum was placed in its respective station. Everything was conducted in the best of order, and profound silence maintained.
We had been commanded to prepare ourselves for a solemn assembly. At length the time arrived for this assembly to meet; previous to which the Prophet Joseph exhorted the elders to solemnize their minds, by casting away every evil from them, in thought, word and deed, and to let their hearts become sanctified, because they need not expect a blessing from God without being duly prepared for it, for the Holy Ghost would not dwell in unholy temples. This meeting took place soon after the house of the Lord had been dedicated.
When the Prophet Joseph had finished the endowments of the First Presidency, the Twelve and the Presiding Bishops, the First Presidency proceeded to lay hands upon each one of them to seal and confirm the anointing; and at the close of each blessing the whole of the quorums responded to it with a loud shout of Hosanna! Hosanna! etc.