The Inglis train ferries for Argentina were built in 1911.
I may have photos somewhere of the early Forth ferries, but 1850 was really before photography became popular.
I may be able to look them out sometime, but it will be a couple of weeks or so.
I have always considered the two Turkish ferries SUHULET and SAHILBENT as to-to, trot on - trot off. A Turkish book describes them as being built for cargo and pack animals.