I have found out a little more about this branch of the family since the earlier postings in this thread.
William Farrant and Hannah Marks were married at Otterford in 1832, and in the early years of their marriage lived at Bishopswood, then Churchstantion, then Coombe St Nicholas and finally Chardstock. I believe Susan to have been born in 1849 rather than 1850 (GRO 1849Q4 Axminster 10/6) though I have not found a baptism for her. Susan's parents were both buried at Chardstock, William in 1875 and Hannah in 1888 (though Hannah probably died in Martock - GRO 1888Q4 Yeovil 5c/258). The Chardstock records including both burials and Susan Farrant's marriage to James Shiner are on line at the "Chardstock Web Museum" website. Following the death of James Shiner I think Susan took up with an Albert Cornelius though I have not found a marriage for them as yet.
I will drop you a line at the e-mail address that you have posted so that you can write to me that way if you prefer.