By the end of May, Guiteau had given himself up entirely to his new obsession. Alone in his room, with nowhere to go and no one to talk to, he pored over newspaper accounts of the battle between Conkling and the White House, fixating on any criticism of Garfield, real or implied. “I kept reading the papers and kept being impressed,” he remembered, “and the idea kept bearing and bearing and bearing down upon me.” Finally, on June 1, thoroughly convinced of “the divinity of the inspiration,” he made up his mind. He would kill the president. The next day, Guiteau began to prepare.
