Washburn cabled Charlotte Serber at Los Alamos. As the librarian, she had access to the Technical Area, and told her husband, physicist Robert Serber, who then went to inform Oppenheimer. When he reached his office, he found that Oppenheimer already knew. The security chief at Los Alamos, Captain Peer de Silva, had received the news through the wiretap and Army Intelligence, and had broken it to Oppenheimer. Tatlock had introduced Oppenheimer to the poetry of John Donne, and it is widely believed he named the first test of a nuclear weapon "Trinity" in reference to one of Donne's poems, as a tribute to her. In 1962, Leslie Groves wrote to Oppenheimer about the origin of the name, and elicited this reply: