Prelude.- Journey at the Turn of the Century.- The House in Djursholm.- Family and Childhood.- Leffler and Mittag.- Gösta’s Parents.- The Teacher’s Family in Stockholm.- Four Years at Stockholm Gymnasium.- Studies.- First Semester in Uppsala.- Festivities and Student Drills.- Summer on the West Coast.- The Aristocracy of Lennartsnäs.- Controversy over the Academic Degree Regulations.- His Sister’s Debut and His Father’s Illness.- First Trip Abroad.- The Stablemaster at Övrejärva.- Doctoral Degree.- Docent in Uppsala.- A Turning Point.- With a Room in Paris.- In Göttingen.- With a Base in Berlin.- Traveling to Helsingfors.- In the Finnish Capital.- Waiting Time.- Professor, Husband, and Entrepreneur.- Installation in Helsingfors, Anniversary Celebration in Uppsala.- In “The Land Called Suomi”.- First Encounter with Italy.- Meeting Signe.- Acta Mathematica.- Wedding and Honeymoon.- New Roles in Stockholm.- Acta and the College.- Sonya K. and the “Brilliant” Life.- Winter Travels.- Summer in Switzerland.- Strife in the Academy of Sciences.- Rector of the College.- Social Entertainments Abound.- A Terrible Summer.- Involved in All Manner of Things.- Traveling to Algeria.- Meeting in Wernigerode.- A New Shift in Stockholm.- King Oscar’s Prize.- New Efforts on Sonya’s Behalf.- Fame, Friends, and Enemies.- Construction in Djursholm.- Sonya’s Death.- Life Goes On – I.- Donation to the College.- Business Affairs, Birth and Death.- Life Goes On – II.- Battlefields.- Celebrating His 50th Birthday.- Seeking a “Practical, Useful Result”.- A Marriage Teetering on the Brink.- One Thing After Another.- On the Verge of Bankruptcy.- Celebrating Niels Henrik Abel.- Two Funerals.- The Nobel Prizes, Another Battle.- The Almanac Dispute.- Signe’s Inheritance.- Political Ambitions and Huge Business Ventures.- Celebrating His 60th Birthday.- King Oscar’s Death.- More Celebrations and More Disputes.- The Big Poincaré Campaign.- From Dreams of Power to Resignation.- A New Home in the Dalarna Region.- Travels, Congresses, Prizes.- The Case Against Prime Minister Staaff.- World War, Writing His Will and Testament.- Establishment of a Mathematics Institute.- International Cooperation After the War.- Signe’s Death.- Still on the Move.- New Travels and Financial Setbacks.- Last Years.