Tazewell Lamar McCorkle Sr. was regarded as a leading authority in the field of commercial explosives. Trained as a chemical engineer, McCorkle spent more than thirty years as a sales representative with the Explosives Department of E.I. du Pont de Nemours & Company. The papers are composed entirely of copies of official DuPont Company materials that McCorkle retained after his retirement. These files provide extensive documentation of departmental policies and procedures governing the storage and delivery of DuPont explosives.