archive.org/details/universalrestitu00ston
The pdf version is too large to upload to the forum, and if I recall correctly the text/ebook versions are letter-reading scans (not manual transcriptions), which for an older English text of this sort (with tons of footnotes and Greek and Syriac etc.) is a recipe for disaster.
But this is the largest of the pre-20th century English universalist argument books I own. My own opinion is that Stonehouse is a little too eclectic to be of best use (and I’m not saying that because he’s a binitarian theist instead of a trinitarian, which though I disagree I find very interesting since he’s the only such author I know about). But he does feature more raw information than any other such book I own, and as the saying goes quantity has a quality of its own. 