(1) Charles Colcock Jones’ History of the Church of God During the Period of Revelation. Rev. Jones was a Southern Presbyterian Minister and Theologian of the mid-1800’s. You will not find this work anywhere (if you do please email me at firstname.lastname@example.org and let me know you have found one so that I can make you an offer on it!) I have a photo-copy of it and will be glad to make copies–at your own cost–for anyone who would be interested. The value of this work is that it is a blend between a systematic and biblical theology. This is one of the finest treatments of pre-Vos biblical theology that has every been written. Highly recommended.
(2) Thomas Peck’s Notes on the Apocalypse. These two short articles are found in volume two of Peck’s miscellanies (reprinted recently by Banner of Truth). These two articles were taken out of a series of lectures that Peck produced on the book of Revelation. For anyone interested in the study of the Apocalypse these lectures, full of biblical theological insight, are phenominal.