I tried to post a photograph of the plaque mentioned in my earlier post, but it doesn't seem to have attached to my post. The plaque says:
"In memory of Alexander Holmes of Larne who died in Rio de Janeiro on April 18th, 1827. And his wife Margaret Holmes (nee Carley) who died in Larne on April 16th 1836. Also of their departed children Jane Glasgow Holmes married William Moon of Liverpool, Alexander Holmes, Elizabeth Holmes, Glasgow Holmes, Margaret Holmes, and Stewart Holmes. This tablet is erected by Isabella McKinnell (nee Holmes) the only surviving child of Alexander and Margaret Holmes in loving remembrance of her parents and brothers and sisters. 'Not dead but gone before', MDCCCLXXX."