Post-war career at Caltech, federal funding for research, relationships among Caltech, Jet Propulsion Lab and Office of Naval Research. Work through 1950 in nuclear physics, astrophysics, element synthesis in stars, influence of Bethe, Greenstein; Bowen/Lauritsen seminars, astronomical observations. Fellowship to Cambridge (1954-55), beginning of collaboration with Hoyle and Burbidges; return to Caltech, further work on stellar element synthesis with Burbidges, personalities of G. Burbidge and Hoyle; contemporary views on cosmology.