|Revenue Vessel Crew Research
Searching for crew members of HMRC Harpy I found your list of revenue vessels circa 1847. I subsequently tried the online catalogue of the National Archives at Kew to see if information could be gained on members of the crew, and found 142 pieces of ADM 119...
Irish Coastguard Records at Kew
The Public Record Office at Kew, London, England, holds a treasure trove of records on the establishment and maintenance of the Coastguard Service in Ireland, England, Scotland and Wales. I have recently returned from a reconnaissance trip to see what records on the early and middle 19th century might be available.