Beauregard’s dislike for Davis

From Shelby Foote’s The Civil War: Fort Sumter to Perryville (384):

Part at least of the study and reflection was devoted to composing other phrases which [Pierre Gustave Toutant de Beauregard] considered descriptive of the enemy who had wronged him. “That living specimen of gall and hatred,” he called [Jefferson] Davis now; “that Individual.”