A heroic time -- South Dakota boy -- "I'm going to be famous" -- Shims and sealing wax -- Oppie -- The deuton affair -- The cyclotron republic -- John Lawrence's mice -- Laureate -- Mr. Loomis -- "Ernest, are you ready?" -- The racetrack -- Oak Ridge -- The road to Trinity -- The postwar bonanza -- Oaths and loyalties -- The shadow of the Super -- Livermore -- The Oppenheimer affair -- The return of small science -- The "clean bomb" -- Element 103.