Wow... how exciting

Julie - There is a good chance that all the Hyslops you mention are related. It would be lovely to link everyone together.
My G.G.G Grandfather John Hyslop and his brother Robert Hyslop emigrated to New York. John returned back to Lochrutton and started a family late in life (his family generally didn't move far from Lochrutton, even to my generation! His brother Robert remained in NY but died of yellow fever. I don't believe that Robert had children.
There was another brother, William Hyslop. Now I believe some of his children may have emigrated, so its this side of the family that the papers have probably come from.
I'm on a day off today, and have a bit of running around to do, but I'll have an investigation into some of the folk you name and report back later.
Tx