So, in the meantime, I followed the state road 55 west to the community of Retrop in the southwest corner of Washita County.
Apparently the community was first settled in 1896. A settler from Iowa, Ira J. Porter applied to have a post office established in town in his name. The Postmaster General approved the application. There was, however, already a station named Porter over in Indian Territory. So, in the interest of time, the Post Office Department reversed the spelling and sent back the approval for a post office named "Retrop". The community kept the name and the post office operated there from 1900 to 1908. There is apparently not much left in old Retrop today. The community held on through the dust bowl years, but most folks moved on or to a newer community nearby.
This is a picture of the old Retrop general store:
Now, in the farm land at the intersection of highway 55 and highway 6 there is a permanent reminder of the community set up on the roadside:
The Retrop Marker:
"Dedicated to the pioneers who settled this community..."