More news! Robert Tyser had three wives, the first was just Emily (no other data), the next, Maria Walter, he married 5 October 1805 at St. Andrew Undershaft, London and they had three sons, Henry 1805, George 1806, John 1811, and Louisa 1812 and Maria 1816. Mother Maria died in 1815. Robert married Arabella Bayley in 1819.
Robert was the son of Thomas Tyser 1746-1816, a builder i nBarking Essex and Sarah Dorman 1748-1828. There were 11 children. If it's of interest let me know and I will copy more. It goes further back too.