There must be a connection between your Marden family & mine. My 2x great grandfather was George John Roberts Marden born Dec. 1832. He left England in 1848 as a cabin passenger & emigrated to NSW. (Died in 1885.) A friend just discovered he had a sister Emily Tamar Mary Marden born 1830. Both children born in the London area. The parents were William Marden & wife Jane (nee Roberts, married in 1829). William was a grocer in East London but appears to have died in 1841. His wife remarried in 1856. There has to be some reason why the name Tamar was given to your Emily (such an unusual name. I am presuming she was named after someone!) My father was named William Marden (Link) after his grandfather & 2x great grandfather.