I know there are a few Shimmin researchers out there. Can anyone help with this query?

In the 1881 Census at 1 Stagadhoo, Marown lived a Lead Miner called Thomas STEPHEN. He had married an Elizabeth Shimmin at Braddan on 17th August 1872. Does anyone know who her parents were?

Her age is shown as 27 therefore born c 1854.

The nearest baptism on IGI is 18 Sep 1853 at Patrick, d/o Thomas Shimmin & Anne.

Can anyone confirm if the above is correct?