History of Friedrich II of Prussia, Volume 04 by Thomas Carlyle

Neither as to intellectual culture, in Duhan's special sphere, and with all Duhan's good-will, was the opportunity extremely golden. It cannot be said that Friedrich, who spells in the way we saw, "ASTEURE" for "A CETTE HEURE," has made shining acquisitions on the literary side. However, in the long-run it becomes clear, his intellect, roving on devious courses, or plodding along the prescribed tram-roads, had been wide awake; and busy all the while, bringing in abundant pabulum of an irregular nature.

He did learn "Arithmetic," "Geography," and the other useful knowledges that were indispensable to him. He knows History extensively; though rather the Roman, French, and general European as the French have taught it him, than that of "Hessen, Brunswick, England," or even the "Electoral and Royal House of Brandenburg," which Papa had recommended. He read History, where he could find it readable, to the end of his life; and had early begun reading it, -- immensely eager to learn, in his little head, what strange things had been, and were, in this strange Planet he was come into.