Ada Alice Crossman born 1862. Child of Mary Crossman and a "Captain" Crossman.
If she really was the daughter of Edmund Crossman, why did she not receive the 1000 UK pounds that her sister's both received upon the death of their grandfather, Robert, Edmund's father, in 1883?
What other alternatives are there?
a) she is a child of Mary Stuart from a previous marriage or perhaps no marriage at all. The suggestion that she may have had children out of wedlock might be inferred by the St Patrick's Catholic Church scribe who wrote upon her death "she led an irregular life". I'm not sure what that is supposed to mean.
b) she was adopted by Mary and Edmund. But why? What circumstances could lead to that?
c) William, Charles and Ada Alice are the children of neither Mary nor Edmund but entirely different parents, the mother being Mary and the father a Captain Crossman.
One argument against this last suggestion is that she named one of her daughters Alice Ida Douglas Petzer. That seems to be a reference to Edmund Douglas who was given it by his mother who was a Douglas.