Railroad Cancels: Southern Iron Car Line, Express Coal Line, South Eastern Line

The cancellations of these companies changed from straight line cancels to circular date stamps sometime in early 1899..

I'm still working on these companies and their relationship to each other. I live in Nairobi Kenya and and am working with scans of my collection. While I have access to web resources I do not have access to a good library, which I need to find out more about these linked Atlanta railroad businesses. An obituary of the lines' President is helpful, but is limited in information. Comment if you know more.