He himself called these years his “university course as a pedagogue,” but they also furnished him with the means to continue the studies in natural history which he had commenced in Jena.  He had laid aside for this purpose part of his salary as tutor, and was permitted, from 1810 to 1812, to complete in Gottingen his astronomical and mineralogical studies.  Yet the wish to try his powers as a pedagogue never deserted him; and when, in 1812, the position of teacher in the Plamann Institute in Berlin was offered him, he accepted it.  During his leisure hours he devoted himself to gymnastic exercises, and even late in life his eyes sparkled when he spoke of his friend, old Jahn, and the political elevation of Prussia.

When the summons “To my People” called the German youth to war, Froebel had already entered his thirty-first year, but this did not prevent his resigning his office and being one of the first to take up arms.  He went to the field with the Lutzow Jagers, and soon after made the acquaintance among his comrades of the theological students Langethal and Middendorf.  When, after the Peace of Paris, the young friends parted, they vowed eternal fidelity, and each solemnly promised to obey the other’s summons, should it ever come.  As soon as Froebel took off the dark uniform of the black Jagers he received a position as curator of the museum of mineralogy in the Berlin University, which he filled so admirably that the position of Professor of Mineralogy was offered to him from Sweden.  But he declined, for another vocation summoned him which duty and inclination forbade him to refuse.

His brother, a pastor in the Thuringian village of Griesheim on the Ilm, died, leaving three sons who needed an instructor.  The widow wished her brother-in-law Friedrich to fill this office, and another brother, a farmer in Osterode, wanted his two boys to join the trio.  When Froebel, in the spring of 1817, resigned his position, his friend Langethal begged him to take his brother Eduard as another pupil, and thus Pestalozzi’s enthusiastic disciple and comrade found his dearest wish fulfilled.  He was now the head of his own school for boys, and these first six pupils—­ as he hoped with the confidence in the star of success peculiar to so many men of genius—­must soon increase to twenty.  Some of these boys were specially gifted:  one became the scholar and politician Julius Froebel, who belonged to the Frankfort Parliament of 1848, and another the Jena Professor of Botany, Eduard Langethal.

The new principal of the school could not teach alone, but he only needed to remind his old army comrade, Middendorf, of his promise, to induce him to interrupt his studies in Berlin, which were nearly completed, and join him.  He also had his eye on Langethal, if his hope should be fulfilled.  He knew what a treasure he would possess for his object in this rare man.

There was great joy in the little Griesheim circle, and the Thuringian (Froebel) did not regret for a moment that he had resigned his secure position; but the Westphalian (Middendorf) saw here the realization of the ideal which Froebel’s kindling words had impressed upon his soul beside many a watch-fire.