Charles Eastham was also investigated, and eliminated, in April 2025.
Following them back there is a son Charles R. Eastham he was born 1883. And despite the answer to the children question he is alive in 1911. Boarding with the Newnham family. He is a Baker.
BUT he then marries Rose Louisa Newnham in 1912, and they are still both accounted for in 1921.
It is likely that Nellie Eastham was Charles Clarke's paramour, but passed off as a relative on his army papers, as suggested a few months ago.
That thread is well worth reading, some excellent research.