Darn, I was hoping to find a profile linked to this question, but no luck. I have adopted an unconnected John Ryerson from that same gedcom, but with no attachments or data. I was hoping to link it to something, because a new Guest claims it is his ancestor, as found through a Google search.
That claim has me stumped, other than perhaps it imerely comes up at the top of the list for "John Ryerson" in a search.