My gggrandmother Ann Allen b23 May 1791 came from Essex, England. She married John Sewell, b 4 Dec 1795 in Essex, England on 15 Oct 1811 and arr in Australia 8 Oct 1841. John Sewell died in York, Western Australia on 27 April 1873, and Ann Allen died in York, W.A. 10 Jan 1872.
I would be interested to hear if you think there is a connection.