Cornell & Diehl is central, to my mind, in the resurgence of burley as a blender's leaf. Burley has always been a staple of OTC codger blends and a base for many aromatics, as well as the base for various condiment tobacco processes. C&D took it from there to some original artisan blending. An earlier post on this thread commented that they found C&D burley blends harsh. I've certainly encountered that; my first go around with Bayou Night was a put-off. But a second try brought home its virtues. They now make such a wide range of burley blends, if you like burley at all, you can probably find at least a few that are pleasant. Craig Tarler was the C&D founder and master of the elevation of burley in premium blends (or one of them anyway), but Jeremy Reeves at SP, now that they are home to C&D, has further refined and expanded blends and made them more accessible to a wider swath of pipe smokers. In my mind, C&D was/is to burley what McClellands was to Virginia tobaccos, certainly not alone in the blending industry, but a central force.