Skimmed and privately engraved, with later straight bar suspension ( originally issued with a ring suspension many Waterloos were altered in the 1840's to fit in with other subsequently awarded medals) , the MGS roll does not mention anything about him being present at Waterloo. Many of his contemporaries in the regiment took part in Waterloo and I suspect when he got his MGS he thought it might be a good thing to find a Waterloo medal to go with it, so, that as he saw it, not to look out of place. I am almost certain that it was worn by Fielding and adds a bit of fun to it but as a renamed Waterloo it is only worth about £400 at most, however I do think the medals should be kept together as I am sure they were both worn by Fielding from 1848. Thank you for your most interesting enquiry.
Paul