Decided to look at Princess Royal and from the information in my #9 reply I have decided to base my searches as follows:
Princess Royal, Brock, from Calcutta 24.1.1843 (of Aberdeen). 1 = Aberdeen
Waterville, Mills, arrived Liverpool from Antwerp 27.12.1843 (of Garlieston). 36 = Dumfries
Uruguay(of Liverpool) lost off Cape Verde 19.6.1845 - crew saved. 62 = Liverpool
Many thanks for the various replies with information and advice. I not yet worked out my next trip to Kew but will report on return what details, if any, has survived and found.
jcmac.