The friend last named also selected from the glacier of the Aar, at the request of Alexander Agassiz, the boulder which now marks his father's grave. With unwearied patience Mr. Mayor passed hours of toilsome search among the blocks of the moraine near the site of the old "Hotel des Neuchatelois," and chose at last a stone so monumental in form that not a touch of the hammer was needed to fit it for its purpose. In conclusion I allow myself the pleasure of recording here my gratitude to him and to all who have aided me in my work. ELIZABETH C. AGASSIZ. CAMBRIDGE, Massachusetts, June 11, 1885. CONTENTS. CHAPTER 1. 1807-1827: TO AGE 20. Birthplace.--Influence of his Mother.--Early Love of Natural History.--Boyish Occupations.--Domestic Education.--First School. --Vacations.--Commercial Life renounced.--College of Lausanne. --Choice of Profession.--Medical School of Zurich.--Life and Studies there.--University of Heidelberg.--Studies interrupted by Illness.--Return to Switzerland.--Occupations during Convalescence. CHAPTER 2. 1827-1828: AGE 20-21. Arrival in Munich.--Lectures.--Relations with the Professors. --Schelling, Martius, Oken, Dollinger.--Relations with Fellow-Students.--The Little Academy.--Plans for Traveling.--Advice from his Parents.--Vacation Journey.--Tri-Centennial Durer Festival at Nuremberg. CHAPTER 3. 1828-1829: AGE 21-22. First Important Work in Natural History.--Spix's Brazilian Fishes. --Second Vacation Trip.--Sketch of Work during University Year. --Extracts from the Journal of Mr. Dinkel.--Home Letters.--Hope of joining Humboldt's Asiatic Expedition.--Diploma of Philosophy. --Completion of First Part of the Spix Fishes.--Letter concerning it from Cuvier. CHAPTER 4. 1829-1830: AGE 22-23. Scientific Meeting at Heidelberg.--Visit at Home.--Illness and Death of his Grandfather.--Return to Munich.--Plans for Future Scientific Publications.--Takes his Degree of Medicine.--Visit to Vienna.--Return to Munich.--Home Letters.--Last Days at Munich. --Autobiographical Review of School and University Life. CHAPTER 5. 1830-1832: AGE 23-25. Year at Home.--Leaves Home for Paris.--Delays on the Road. --Cholera.--Arrival in Paris.--First Visit to Cuvier.--Cuvier's Kindness.--His Death.--Poverty in Paris.--Home Letters concerning Embarrassments and about his Work.--Singular Dream. CHAPTER 6. 1832: AGE 25. Unexpected Relief from Difficulties.--Correspondence with Humboldt. --Excursion to the Coast of Normandy.--First Sight of the Sea. --Correspondence concerning Professorship at Neuchatel.--Birthday Fete.--Invitation to Chair of Natural History at Neuchatel. --Acceptance.--Letter to Humboldt. CHAPTER 7. 1832-1834: AGE 25-27.