Interesting post!
I think it fair to say that Miller, despite what some of his biographers wrote, did not come up with his time prophecies entirely through his own study of the Bible using only the Concordance. Of course the basic ideas, day-for-a-year, etc had been appearing for centuries. I really would be interested in knowing exactly what books Miller would have had access to, or indeed what books were commonly found in NE America at that time.
On another note, a previous post mentioned the SDA books 'The Prophetic Faith of Our Fathers'. I have looked at only one of these (there are 4 volumes in the series) and was really impressed with the detail and candid way the history of the beliefs was presented. I think they were written in the 40's or 50's?? and the author/editor's name was Froome or something like that.