You have not yet managed to show that Mr Ball was in the Black Watch- was Major Ward in the Black Watch? Why did he not mention this?
You see what you want to see, Robot- sadly that doesn't make it true.
Most 18th century British military firearms I have seen might have a regimental or company number, very rare to have a name- could Mr Ball read by the way? Most firearms were issued to recruits, then taken back at the end of their service.
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Stay tuned...When I...Not You...Finish Researching... The What, When, Which and Why...Samuel Ball joined the Canadian Grenadiers!
May be..Samuel Ball did not mention or return his firearm...because he was part of a...Secret Freemason Organization bent on preserving the Secret of Oak Island!