Hi, Lee, send me a message in my profile with your email address; I'm all over this; have a 4th cousin of mine (and yours it sounds like :-) descendant of William Cardin and Amelia Isabella Mortimer who lives in Australia too. Amelia kept in touch with the Cardins in St. Kitts and London after emigrating so we have pictures of Ann Chiles from them and others; all my becoming-many 4th cousins have good "stuff" except me! :-)
I'm going to St. Kitts in February 2013 and taking my London researcher with me to help; we'll find the Salmon St. Kitts info for you (as well as Cardin). We knew William died in St. Kitts but don't know when; our last mention of him is 1820 and his daughter was born 1841-42, I think, so after that The Cardin-Bunn.com site is mine too.