There’s a Catherine, 24 December 1826, baptism recorded at St Marys RC, Sydney, daughter of Benjamin WEST late of the 48th regiment. Sponsors Thomas and Mary ASHTON... and by 1828, Catherine West aged 2, Protestant, in household of Benjamin WEST, Clarence St, Sydney...
Thomas ASHTON was Colour Sergeant for 48th Regiment.
Benjamin & Biddy WEST recorded as parents in St Philips C of E register (ie NSW Chaplains Register for all clergy of various denominations) John, their son, born 5 May 1819, baptised 16 May 1819.
Benjamin and Bridget WEST, parents for Benjamin born 10 Jan 1825, baptised 30 Jan 1825, St Philips register
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Here’s another Catherine WEST ... SEE the Col Sec Papers... Index has her in family arriving 1821, per Westmoreland and victualled from Windsor stores for six months.
General Muster Sept 1825 Catherine WEST, daughter of Thomas WEST, per Westmoreland 1821 came free, at Bathurst district ...
1828 Census Catherine WEST, per Westmoreland 1821, aged 8, in household of Thomas WEST, Muff Farm, Bathurst.
Note, further info available for Thomas WEST who came free per Westmoreland, with wife, 2 sons, 6 daughters.
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There's other possible candidates for the bride in the 1844 m.c.
BUT I am concerned that it will be speculative until further info can be gleaned from those m.c.s... and the parish registers.
JM