From the album: 9000 Miles In A Knight
Clason's Touring Atlas had been in publication for several years by 1930. By that year, highways had been under tremendous improvement, most importantly in the installation of route signs. Pavement was almost secondary in importance to the ability to find your way across country. In fact, on the MacHenry's 9000-mile road trip, nearly 4000 miles were on graded dirt or gravel roads.