Good day gentlemen,
Am particularly interested in your discussion since I had just be doing some research on George Ferris myself. As I read Phil's comments on Ferris, he stated in the Exeter section that his marks had been seen from 1812 - 1832. Also noted: flatware maker mentioned in Exeter records 1812 - 1860. Mark is also displayed in the London section which states: Possibly the mark of George Ferris of Exeter over stamped on the mark of his supplier. Here on 925 states that George Ferris registered this mark in 1800 and died 1840. Realize that it creates some confusion over what has been posted above even though it may answer the question of who the first mark may be.
This spoon I am describing is also a bright cut of the same style engraved with four initials and a date of 1812. Makers mark, duty mark, sterling mark, and Exeter mark are clear to see. Now the date letter is only a partial of what appears to be an S, for Exeter that mark corresponds to 1814.
So again there is some question as to when he engraved his work although an engraving can be added anytime with what ever needs to be added for the client. But twice with two different items by Mr Ferris. My apologies for no images, it is not mine.
I pray this does not add more confusion than it solves.