Hello Prue,
Its PERCY again. I'm going to be dogmatic about this subject.
(1) Your engraving was done Circa 1860-1865 --- compare the portrait of President Lincoln of the same period. That means, as I said before, this chap cannot have been born before 1815-1820.
(2) He is not 'just any old person'. Even poor quality engravings of the kind seen in publications of the time were expensive. Your engraving is an excellent, high quality, COSTLY, portrait of a well dressed man with a gold (?) watch and chain, wedding(?) ring, and (possibly) a signet(?) ring. A man decidedly of the relatively leisured, learned, and relatively affluent classes.
(3) Unlike photographs, when objects (eg.the book) were shown in engraved or oil portraits, they were put there to indicate the occupation, interest, or 'claim to fame' of the individual concerned : NOT mere literacy.
(4) Your man, therefore, CANNOT be the man you thought he was, but MAY be one of the two sons ? He is the right age for that.
Whoever he is, he was probably a scholar, an author or a poet. Extremely unlikely to have been a
lawyer -- because they were invariably shown as such ---- nor likely to have been engaged in industry.
He could, just possibly have been engaged in some way in politics --- possibly in one of the reform
movements of the time.
PERCY