I forget exactly how I found this, but it is a perfect match for the passenger list containing the 15 year-old Gustav Römhild. The age matches exactly what is expected from Gustav's gravestone and other documents. The origin is listed as Schwarzburg, but I take this to mean the region or "state" rather than the village. Here is a map of Schwarzburg-Sondershausen.
Gustav is 15 and may be traveling with other youngsters from Schwarzberg to Philadelphia. This suggests that he was not the first in his family to come to America. If I am ever able to find the village where he came from, much may become clear.
He began as a "farmer" and ended as a turner and carver of wood. Where for example and from whom did he learn his trade. I would love to know.
Addendum 16 Sep 2011: Gustav came from Grossbreitenbach in the Thüringen Forrest. He was a millers son and would have been used to working with wood. I suspect that "farmer" was added in a pro forma way.