thanks for taking the trouble to look up this information.Quite a lot of it I already knew about!
You do realise that there a 2 Charles Smith Hannington's. One was born in 1812 and the other 1814.
Charles Smith Hannington b.1812 married Martha Pile/Pyle, and come out here to Australia. Martha married 3 times. But I didn't know where she was born. Her father may be John.
The Martha Pile/Pyle you had as being born 1815 Devon, with sons Henry & George, is not the same Martha that married Charles Smith Hannington. You information is in 1881 England Census, Martha was already dead here in Australia..
Martha died in 1874 in Adelaide SA., she first married Charles Smith Hannington, then Alfred Snelling and finally Thomas Jellett.
Alfred Snelling b. ? d. 6 Dec 1864 S.A. married Martha 31 Oct 1855. Adelaide S.A.
Thomas Jellett b. 1822 (do not know where) d. 5 Aug 1876 S.A., if you find him or any children ... he married Martha 1 Jul 1868 Bowden. S.A.
Charles Smith Hannington b. 1814, 1st marriage Elizabeth Clarke Gardner, when she died, he married Blanche. They died in England.