I checked thru Hallet's 19th Century Church Registers of Bermuda and did not find any entries for a Robert Wainwright. There were alot of Wainwrights on the island and a few were even masons but none seem to have matching names. I did check the whole island, not just Hamilton. I would suggest you also post on ancestry.com's message board. They have quite a few Bermudians who post there and the story may be familiar to one of them. I'm sorry I could not be of more use. If you know any other names he might have used, I would be happy to check for them. I did find a birth record for Artemisia Gwendoline Wainwright born in 1885 to a Robert Henry Wainwright and wife Martha in Hamilton Parish, and there is a small break in the Hamilton records from 1877- 1881. It is possible that he may have been born in the intervening years. Sadly that is the only possiblity I could find. I did not even find any records fro Robert and Martha's marriage or deaths.