L. AGASSIZ.
This year closed for Agassiz with a heavy sorrow. His mother's health had been failing of late, and November brought the news of her death. Separated though they were, there had never been any break in their intercourse. As far as he could, he kept her advised of all his projects and undertakings, and his work was no less interesting to her when the ocean lay between them than when he could daily share it with her. She had an unbounded sympathy with him in the new ties he had formed in this country, and seemed indeed as intimately allied with his later life here as with its earlier European portion.
His own health, which had seemed for a time to have regained the vigor of youth, broke down again in the following spring, and an attack about the region of the heart disabled him for a number of weeks. To this date belongs a short correspondence between Agassiz and Oswald Heer. Heer's work on the Fossil Flora of the Arctics had recently appeared, and a presentation copy from him reached Agassiz as he was slowly regaining strength after his illness, although still confined to the house. It could not have come at a happier moment, for it engrossed him completely, and turned his thoughts away from the occupations which he was not yet allowed to resume. The book had a twofold interest for him: although in another branch of science, it was akin to his own earlier investigations, inasmuch as it reconstructed the once rich flora of the polar regions as he himself had reconstructed the fauna of past geological times; it clothed their frozen fields with forests as he had sheeted now fertile lands with ice. In short, it appealed powerfully to the imagination, and no child in the tedious hours of convalescence was ever more beguiled by a story-book than he by the pictures which this erudite work called up.
AGASSIZ TO OSWALD HEER.
CAMBRIDGE, May 12, 1868.
MY HONORED COLLEAGUE,
Your beautiful book on the Fossil Arctic Flora reached me, just as I was recovering from a tedious and painful illness. I could, therefore, take it in hand at once, and have been delighted with it. You give a captivating picture of the successive changes which the Arctic regions have undergone. No work could be more valuable, either as a means of opening recent investigations in Paleontology to the larger public, or of advancing science itself. If I can find the time I mean to prepare an abridgment in popular form for one of our reviews. Meantime I have written to Professor Henry, Superintendent of the Smithsonian Institution at Washington, that he should subscribe for a number of copies to be distributed among less wealthy establishments. I hope he will do this, and I shall continue to urge it, since my friendly relations with him give me a right so to do. I have, moreover, written to the directors of various prominent institutions, in order that your work, so far as is possible for works of that kind, may become known in the United States, and reach such persons as would naturally be interested in it. . .
With friendly remembrance, yours always,
LOUIS AGASSIZ.
The answer is some months later in date, but is given here for its connection.