Recently, I came across Miller’s Thoughts on Public Prayer, and was greatly helped. I knew Miller to be a staunch Old School Presbyterian, and so I wondered what else of his I could find online for free. Turns out, pretty much everything he wrote is at Google Books. Help yourself!
UPDATE: The original post was by no means exhaustive, but thankfully the PCA Historical Center already had compiled the Samuel Miller Collection. While there aren’t many links at the Collection, there is a complete bibliography listed. I was reminded of this by The Confessional Presbyterian which points this resource out.
A Brief Retrospect of the Eighteenth Century (1803, 1805)
Letters on Unitarianism (1821)