A gathering of scientists, outdoorsmen, and family -- Family background -- The college years -- Medical and graduate school -- On the move : Philadelphia to Minneapolis to Boston to Rochester -- The biological challenges of flight -- Mayo Clinic prepares for war -- David Clark, collaborator and manufacturer -- The centrifuge experiments begin -- Flight testing in the G-Whiz -- Operation Paperclip -- The 1950s : cardiac catheterization, dye dilution, and oximetry -- The centrifuge spins again -- Family life in Rochester -- Hunting and fishing trips -- The career investigator -- Sabbatical year, 1965-66 -- Expanding scientific and medical instrumentation -- Sabbatical year in London, 1972-73 -- The DSR and the death of the centrifuge -- Birchwood and Cedar Ridge -- Sailing from Honolulu to Seattle on the Daisy -- Life after Mayo : the visiting professor -- A long farewell -- So, what was it about Earl?