I'd love to have this as an original but

https://www.ebay.com/itm/1800-BENJAMIN-FARNHAM-Dissertation-on-the-PROPHECIES-Revelations-MILLENNIALISM-/282729421444

Way too expensive for me.

However, there is this:

https://books.google.com/books?id=VLJCAQAAMAAJ&pg=PR1&lpg=PR1&dq=benjamin+farnham+prophecies&source=bl&ots=YzOmpXvam_&sig=ACfU3U1_Ha4uFT44Ha6e0c_r65IrAlxJ-g&hl=en&sa=X&ved=2ahUKEwj96-Pb3JLlAhVHsZ4KHTmyBroQ6AEwCHoECDAQAg#v=onepage&q=benjamin%20farnham%20prophecies&f=false