Hello Jim and thank you so very much for your valuable comments!
Quite to the contrary, what you said is probably the most important part of this discussion. One must differentiate between the points that although my hanger is English made, it very possibly could have ended up in a colonist's hands. There were very few quality American sword makers during this period and while blacksmith-made swords were more common, a sword of quality had to come from outside the colonies. Considering the vast numbers of American soldiers of the period, arms were desperately needed.
One of the crucial ways this could be accomplished was through capture. Considering the numbers you quote of captured merchant ships alone, one can see where the necessity was met. Whether through capture in battle, plundering from ships or supply lines, or through illicit purchase (there were still those on the continent selling to the colonies), it definately leaves the door open for American use. Your point drives home the reason Neumann's guide contains so many different weapons from other nationalities and periods: for the colonists, it was make do with what one could get their hands on. They did what they had to do to survive, like a certain occupation of 'sea robbers' I'm familiar with-
Thank you for reminding me of this fact and keeping me on my toes, Jim