That very likely is him. I had previously found an index to a series of obituaries that listed a Roswell Ranney from Erie County, Ohio who died on August 9, 18__ . His age was listed as 23/29. The August 8, 1849 on your document fits. So it looks like he was a cabinet maker, Castalia figures into his location and he died of cholera. This should give me something to work on as I search for his illusive parents.
Thank you very much, Ohio Susan.