Some years ago, I succumbed to the blandishments of the overloaded bookshelves at Half-Price Books. I knew I shouldn’t have wandered into the section housing assortments of ‘Texiana’ but I did and I was tempted. Since I can resist anything but temptation, I gave in and bought a slightly oversized volume (with color plates!) with the gripping title of German Artist on the Texas Frontier: Friedrich Richard Petri