Jamie,

There are a whole bunch of those parish maps. I have hard copies of Avoyelles and St. Landry, I don't think there are scans anywhere but now that you mention it, I should get them scanned so I would have them on disc. I don't know which parishes they have, but I know there are several. Some are good maps, some are great maps, and at least one (Pointe Coupee) is pretty much worthless. That one just has section lines and bodies of water, if I remember correctly, whereas the one of Rapides has roads, sugar mills, cotton gins, houses, even down to rows of shrubs in some places. Avoyelles has some landowners, roads and their conditions in poor weather, ferries, mills, etc. St. Landry is similar. They're really cool maps, and include old abandoned roads, which means those roads probably date back to the very early 1800s or maybe even late 1700s.

The maps are in the Collection of Captured Confederate Maps, Record Group Z-33, National Archives. A lot of them are in two parts (they're big maps). Avoyelles Parish is maps 73 and 74. From what I remember, all the parishes are not by the same cartographer, which probably explains some of the difference in details.