I would guess that I am not quite as close as you would wish! I am researching on this part of the line becase of collatteral connections to my family's line. I am descended from Alexander (abt 1720) thru Hugh. Because I have been trying to locate a "missing brother" on this line with no sucess, I started tracking the rest of the cousins, and siblings in hopes of locating him. He emigrated from Scotland at the same time (give or take a year) as Alexander(b. 1836, Lorain co. family) and Hugh and James (my "side of the tree"). Because the records for the line I initially referenced followed the same migration track ie. Glasgow, Ontario, Ohio and (I think) finally Denver area, I put out info on other "cousins" hoping to pick up the trail. We probably still have data to exchange, if you are tracking the siblings, etc. of your primary line. I am especially interested in the Lambertons who settled in the toledo area If you could sketch out how they settled/ traveled thru that area. Did they move from there to Denver, or vice versa? Did any go west or to the northwest? Several of the "Hugh" cousins ended up in the northwest on both sides of the Canadian line.
I am assuming that you already know that both of our lines traveled between Ireland and Scotland at least once, and in a few instances, I suspect more than once. that link has not been well documented. I know of at least one "missing family Bible" which was supposed to prove the link. If you are going to be there, you might be able to check this out. You would certainly have a lot of instant cousins who would be very interested in your results! Also, in case you get to England, did you know that at least one Lamberton in my line (so, possibly also in yours) had ties to Liverpool. Sorry if I took off on what you already know, or is any of this a direction for you?