The ‘collection’ is incomplete at best. There are two examples down on Crouch Road in Washington County which date to the 1800’s, one to 1843 and the other was moved to the current sight in the early 1950’s to prevent it being covered by the new ‘Boone Lake’. I grew up in that log house.
Thank goodness, it is very incomplete — there are quite a few more vintage log cabins in Tennessee. Twenty seemed sufficient for one article and the ones included are practically a compendium of the Southern Appalachian log cabin styles — several types of corner joints are represented (saddle, dovetail, Pike or steeple), there are one-, one-and-one-half, and two-story structures, and the configurations include single-pen, double-pen, and saddlebag. I have been collecting material for an article on the Hermitage cabins in Nasheville.