This immigrant story is common to many families, and needs to be documented.
As for your Tennessee group of Culberts, who is the earliest KNOWN ancestor? I'll check my database, and email you what I have on them.
As for your Chester, PA connection, my Culberts were also in the Chester, PA area. We may have a distant connection here. Researching living persons is quite difficult, but if you tell me what is KNOWN, I'll try to help find this James.
Contact me directly: [jhculbert at yahoo.com]