http://www.mun.ca/rels/restmov/
This site had everything from him and the whole movement, but it's apparently being moved.
There is access to a digitized version in the Internet Archives from the link towards the bottom here:
http://archive.org/details/millennialharbi00unkngoog
I downloaded the complete former website from the Memorial University of Newfoundland, so I could rehost the whole thing if neither they, nor Abilene, bring it back. There had to be many hundreds of documents in all.
The first critique came on February 7th, 1831. I found a separate link to this here:
http://www.thywordistruth.com/Questions_Class/tpq/Review_of_Book_of_Mormon.html#.UdIrwxi9Lfo
This initially looks correct and hopefully is complete. I believe there was an at least one additional time he revisited the Book of Mormon, as I recall he wound up critiquing the “fixes.”
I will need to power up my other computer to get to everything in the site. Tell me if you need me to do so.
I don't immediately recall if he dealt with anti-Trinitarian beliefs within this, but I do remember getting quite a chuckle out of just how he worded his insights. You will enjoy it, too.
Thank you.
Bookmarked.