To directly answer your question about the town, it is --
Catlin: Catlin was located within city limits of present-day Longview, across from Kelso. It was largely a continuation of Freeport. It was located on the Donation Land Claim of Seth and Mary Catlin, which they settled in the 1860s. The town was named in 1889. Orin Hinson established the post office, which operated from 1892 to 1909 (Ramsey, p. 193-4). See-http://www.drizzle.com/~jtenlen/wacowlitz/townsal.html
I am most interested in your reactions to my earlier post about the 1880 Census in Wyoming and your conclusions.