I learned that at the age of 57, he married a 16-yr old girl. Pratt's first wife had this to say about the affair:
Van Wagoner 1986.Here was my husband, gray headed, taking to his bed young girls in mockery of marriage. Of course there could be no joy for him in such an intercourse except for the indulgence of his fanaticism and of something else, perhaps, which I hesitate to mention.
I've read before that Joseph Smith tried to make Sarah Pratt his own plural wife and Sarah refused him. Yah! Go Sarah! I was also reminded of something else I skimmed over a while back:
Orson Pratt became estranged from the church and Smith. Wilford Woodruff stated that "Dr. John Cook Bennett was the ruin of Orson Pratt". Van Wagoner and Walker note that, on August 20, 1842, "after four days of fruitless efforts at reconciliation, the Twelve excommunicated Pratt for 'insubordination' and Sarah for 'adultery'".
So, this is a big deal. This is saying that Sarah was accused of adultery right after refusing to marry Joseph Smith?! But I guess Van Wagoner says this may have just been a rumor.
Regarding Orson's writings in the Seer (1853), it appears they were condemned by the FP in 1865. I guess his work on spiritual vegetables is not doctrine after all. How would it be to have your work condemned by the church - a work you wrote while appointed an apostle of the Lord.