A distinguished gentleman in robes and chain of office sitting on a throne (of sorts)

This fine Poole portrait portraying probably the Lord Mayor of a city to end this week. The robes and chain are very ornate and he is seated on a very finely carved chair - but who is he and what was the office he held?..Today's contributors, including sharon.corbet ( /photos/scorbet/ ) , Niall McAuley ( /photos/gnmcauley/ ) and guliolopez ( /photos/20727502@N00/ ) spotted the coat or arms, motto and regalia as those of Waterford - so clearly this is a Waterford mayor. Given that the catalogue date of the image was 1927, it was originally thought that maybe this was John J. Wyley - who was mayor that year. However, various clues didn't support that suggestion (not least the age of the man, the name of the person who comissioned the photo, and a "copy" label in the catalogue entry). There is therefore much stronger evidence that the mayor pictured is Henry Grainger, who was mayor in 1898. It seems likely a family member (probably a daughter) commissioned a copy from the Poole studio during the 1920s.......Photographer: A. H. Poole..Collection: Poole Photographic Studio ( http://catalogue.nli.ie/Search/Results?lookfor=A.H.+Poole&type=Author&sort=title&view=grid ) , Waterford..Date: c.3 September 1927 (likely date earlier photo was copied. Original may date to c.1898)..NLI Ref: POOLEWP 3458 ( vtls000594067 ) ..You can also view this image, and many thousands of others, on the NLI’s catalogue at catalogue.nli.ie ( http://catalogue.nli.ie )