Sermons and Doctrinal Classes
You can download a lot of Sermons of Rev. Theodore Pitcairn (archive, around 1GB)
You can download a lot of Doctrinal Classes of Rev. Theodore Pitcairn (archive, around 200MB)
You can download Sermons on the Word by Rev. Edward Hyatt (one file)
You can download Sermons on Life by Rev. Edward Hyatt (achive, one file)