Have you looked at the various options I mentioned earlier?
The BDA index is an ongoing project, and there's certainly more than 2 chaps noted there who could be 'your' Robert STEWART.
Anyway, here's some more on that soldier
.....
I'm not sure what to do with this soldier information as if he wasn't a soldier any more when he arrived in Australia with his family I don't know where to look for his records without any other identifying information.
The Robert STEWART records I found discharged in 1824 in Sydney was a Robert STEWART who had enlisted in 1801 in Leeds, Yorkshire and appears to be a different Robert STEWART (d.10 may 1834) who married a Mary - both of whom are buried in the Devonshire Street Cemetery in Sydney.
Any thoughts?
Sydney Burial Ground Re-internments and Monumental Inscriptions.
Robert and Mary STEWART’s stone after removal from Devonshire St 1901 to La Perouse CofE, Section 4S, Plot 147.
Robert STEWART Late of HM 46TH Regt of Foot, died 10 May 1834 aged 56 years.
Robert STEWART enlisted for 14 years, and seems his original regiment was the 46th, then on 25th March 1817 transferred to 48th regiment and then on 24 March 1824 to 3rd regiment. (basically transferring allowed him to remain in NSW colony when those regiments tours of duty as garrison forces in NSW/VDL was completed and the regiments where shipped out.
https://www.bda-online.org.au/files/MR9_Military.pdf The Col Sec Papers INDEX has Robert STEWART formerly of the 48th, as being invalided from the 48th Regiment, per a memo where he is recorded as STEWARD … November 1825. He received orders for grants of land 15 Nov 1825. There’s NSW State Archives Ref numbers etc.
https://www.records.nsw.gov.au/archives/collections-and-research/guides-and-indexes/colonial-secretarys-papers If you are looking up the regiments, then the Col Sec papers INDEX includes them under the words eg ‘Forty-eighth (48th) Regiment” or “Forty-seventh (47th) Regiment” and the reel numbers are usually noted there too, and can often be digitised at Trove via the Australian Joint Copying Project.
JM