Let's concentrate on this:
"President Smith then stated that the meeting had been called, because God had commanded it; and it was made known to him by vision and by the Holy Spirit. He then gave a revelation of some of the circumstances attending us while journeying to Zion...our trial, sufferings; and said God had not designed all this for nothing, but He had it in remembrance yet; and it was the will of God that those who went to Zion, with a determination to lay down their lives, if necessary, should be ordained to the ministry, and go forth to prune the vineyard for the last time, or the coming of the Lord, which was nigheven fifty-six years would wind up the scene."
History of the Church, Vol. 2, p. 182.
Before I go any further we need to agree this is correct.