hi Smid
welcome to rootschat

might be difficult to find anymore info. at least till the 1911 census comes out
how old was davids mother in 1898/1901 ?(38 in 1901 ? born where ?)
was bruce annie's maiden name or a married surname ?
have you found a death certificate for her ?
perhaps david signed her death certificate

one small point , newtyle actually comes under angus in 1898/1901 on scotlandspeople(although i thought it was in perthshire)
ev