Back to one of the original scans, there was a cover with the return address from the Hotel Orleans in what looks like "Satherville", Iowa. Since there was never a town called "Satherville", I found out that the town is "Estherville" or, in most cases, the Hotel Orleans was noted to have been at Spirit Lake, Iowa. Here's the cover again:

A fascinating history of the Hotel Orleans is at this link:
http://plainshumanities.unl.edu/pea...an.0002.htmlI was particularly interested in this quote from the above link which certainly explains the RPO postmark on the cover:
Quote:
A project of the Burlington, Cedar Rapids, and Northern railway, officials of the company built the magnificent hotel in 1883 to induce passengers to buy tickets on their train.