In the evening attend[ed] a High Councel of the Twelve Apostles. Had a glorious time and gave them many instruction[s] concerning their duties for time to come. Told them that it was the will of God they should take their families to Missouri next season.
Also [told them to] attend this fall the Solemn Assembly of the first Elders for the organization of the School of the Prophets and attend to the ordinence of the washing of feet and to prepare the[i]r hearts in all humility for an endowment with power from on high. To which they all agreed with one accord and seamed to be greatly rejoiced. May God spare the lives of the Twelve [Apostles] with one accord to a good old age for Christ the Redeemer's sake. Amen.
[Faulring, Scott (ed.), An American Prophet's Record: The Diaries and Journals of Joseph Smith: Joseph Smith Diary, 1835-36, http://amzn.to/jsdiaries]