Hya Kenjo
Well that's some amount of information! As for your Alexander being a "ships captain" there are many reasons why the family thought that he was SC. Maybe he said it in jest at some time, the story of his life got twisted, a bit like Chinese whispers. I have a 3x g/granddad who put on his second marriage certificate that his father's occupation was a soldier in the army. What a story teller! He never was a soldier he was a weaver and died in 1823! I think he was trying to impress the new wife! I can also remember being at the bakers van with my greatgrandfather and him telling me that he used to be a baker and made all the cakes and bread on the van. For years I believed this, even when I was older and knew he was a miner all his life, a part of me still believed he was a baker!
Going to take a proper look at the web site you put forward, it looks interesting and you never know what you might find.
GEN10