Ihave just read your request re the above couple - Margaret's name was Dowling - she was transported under the alias of Darnell - they were buried at Sackville reach & their headstones removed in late 1960's to Ebenezer Church as Owen had donated the land fo9r the building of the Church. In 1988 The Cavanoughs did put a new headstone on their burial place at Sackville.
If you are a rellie please let me know your parents & grandparents names & I will connect you to my research. So far I have located in excess of 14000.
Regards,
Pat H.