I could use some help from someone familiar with French profiles & sources.
I have found some Australian sources for this Frenchman, but haven't been able to spot birth/baptism or death (all in France).
He was also (apparently) a deserter from the French Navy - not sure if there are available sources for that.
On some documents in Australia he wrote his surname as Menvielle Sarthou, but on others he appears as Menvielle and as Sarthou
Thanks i anticipation.