Hi there,
Perhaps before you get too involved in that following up you could check your existing research records and confirm the date and place for Bertha Tandy’s marriage to Stephen King, .... I am asking about other records, to help you validate what is on the NSW BDM certificate for their 1853 ECR (Vol 39C, line 153) .
Simply put, I can see two possibles..
Stephen KING, widowed, marriage place of Ingleburn, on 30 May 1853 to Bertha Tandy, widowed.
AND
Stephen KING, widowed, marriage place of St Mary, Denham Court on 13 May 1853, to Bertha TANDY, widowed
While I well understand the how/why there would be two different parish records for the likely ONE event, and that the NSW BDM online index seemingly gives only the MH (C of E, Denham Court) register entry, I wonder if the Ingleburn register will have further information about Bertha’s Mr Tandy, or for that matter that the Denham Court register has further info about that Mr Tandy.
I think it would be unusual for there to be two couples, both widowed, both marrying in the County of Cumberland, both seemingly C of E ceremonies, with both celebrated in May 1853 (but Denham Court 13th, and Ingleburn 30th) and with both parties being named as a Stephen King and a Bertha Tandy.
Source : Historical Records, M00381-9 and M31026-3 at this link :
https://familysearch.org/ Cheers, JM