 Booth then jumped from the President's box to the stage, where he raised his knife and shouted "Sic semper tyrannis" (Latin for "Thus always to tyrants," attributed to Brutus at Caesar's assassination and the Virginia state motto), while others said he added, "I have done it, the South is avenged!" Various accounts state that Booth injured his leg when his spur snagged a decorative U.S. Treasury Guard flag while leaping to the stage. Historian Michael W. Kauffman questioned this legend in his book, American Brutus: John Wilkes Booth and the Lincoln Conspiracies, writing in 2004 that eyewitness accounts of Booth's hurried stage exit made it unlikely that his leg was broken then. Kauffman contends that Booth was injured later that night during his flight to escape when his horse tripped and fell on him, calling Booth's claim to the contrary an exaggeration to portray his own actions as heroic.
