This request caused great commotion in the little home, for the writer of the letter was a man of wealth in Geneva, but, after careful consideration, both parents and son declined the offer, preferring to struggle with poverty rather than bear separation.
At the end of the two years in Zurich, Auguste went to the commercial house of his uncle at Neuchâtel, and Louis to the University of Heidelberg, taking letters of introduction from Professor Schinz and others. Professor Tiedemann, the chancellor, had studied with Schinz; therefore, Agassiz received a warm welcome, and an offer of books from his library.
The young student worked earnestly. He wrote to his father: "Every morning I rise at six o'clock, dress and breakfast. At seven I go to my lectures given during the morning.... If, in the interval, I have a free hour, as sometimes happens from ten to eleven, I occupy it in making anatomical preparations.... From twelve to one I practise fencing. We dine at about one o'clock, after which I walk till two, when I return to the house and to my studies till five o'clock. From five to six we have a lecture from the renowned Tiedemann. After that, I either take a bath in the Neckar, or another walk. From eight to nine I resume my special work, and then, according to my inclination, go to the Swiss Club, or, if I am tired, to bed. I have my evening service and talk silently with you, believing that at that hour you also do not forget your Louis, who thinks always of you."
At Heidelberg, like Humboldt, Agassiz needed a congenial friend, and found one in Alexander Braun, of Carlsruhe, an ardent lover of botany, afterward Director of the Botanical Gardens in Berlin. He wrote to his parents concerning Agassiz, "a rare comet on the Heidelberg horizon.... Not only do we collect and learn to observe all manner of things, but we have also an opportunity of exchanging our views on scientific matters in general. I learn a great deal from him, for he is much more at home in zoölogy than I am. He is familiar with almost all the known mammalia, recognizes the birds from far off by their song, and can give a name to every fish in the water.
"In the morning we often stroll together through the fish market, where he explains to me all the different species. He is going to teach me how to stuff fishes, and then we intend to make a collection of all the native kinds. Many other useful things he knows; speaks German and French equally well, English and Italian fairly, so that I have already appointed him to be my interpreter on some future vacation trip to Italy. He is well acquainted with ancient languages also, and studies medicine besides."
Schimper, another brilliant botanist, was a friend of both Braun and Agassiz. The professor in zoölogy, Leuckart, was very fond of these bright pupils, and allowed himself to be gotten up at seven in the morning, to give them extra lectures.
When vacation came, Braun took Agassiz to his home; a cultured place, rich in books, music, and collections of plants and animals. Agassiz was very happy there; possibly the happiness was increased by the fact that Braun had a lovely and artistic sister, Cecile. Agassiz wrote home, "My happiness would be perfect were it not for the painful thought which pursues me everywhere, that I live on your privations; yet it is impossible for me to diminish my expenses further. You would lift a great weight from my heart if you could relieve yourself of this burden by an arrangement with my uncle at Neuchâtel.... Otherwise I am well, going on as usual, always working as hard as I can, and I believe all the professors whose lectures I attend are satisfied with me."
In the spring of 1827, when Agassiz was twenty, he was taken ill of typhus fever, and it was feared he would not recover. As soon as possible he was removed to Braun's home, and most tenderly cared for. When he became able, he went to his own home, at Orbe. From there he writes to Braun: "I had the good fortune to find at least thirty specimens of Bombinator obstetricans, with the eggs. Tell Dr. Leuckart that I will bring him some,—and some for you also. I kept several alive, laid in damp moss; after fourteen days the eggs were almost as large as peas, and the little tadpoles moved about inside in all directions. The mother stripped the eggs from her legs, and one of the little tadpoles came out, but died for want of water. Then I placed the whole mass of eggs in a vessel filled with water, and behold! in about an hour some twenty young ones were swimming freely about. I shall spare no pains to raise them, and I hope, if I begin aright, to make fine toads of them in the end. My oldest sister is busy every day in making drawings for me to illustrate their gradual development."
In the fall of 1827, Agassiz and Braun, after spending a little more than a year at Heidelberg, went to the University of Munich, there meeting Schimper. He wrote home, that from one of his windows he could see "the whole chain of the Tyrolean Alps, as far as Appenzell.... It is a great pleasure to have at least a part of our Swiss mountains always in sight. To enjoy it the more, I have placed my table opposite the window, so that every time I lift my head my eyes rest on our dear country."
At Munich, the young students were stimulated by the presence of many noted men. Döllinger lectured on comparative anatomy; Schelling, on philosophy; Oken, on natural history, physiology, and zoölogy; Martius, on botany. Agassiz and Braun roomed in Döllinger's house. This room soon became the intellectual centre for the bright men of the college, and was called "the little academy." Here different students gave lectures, each on his special subject of study; the professors, even, coming as listeners.