§ 11. Firmly convinced of the importance of the Kindergarten for the whole human race, Froebel described his system in a weekly paper (his _Sonntagsblatt_) which appeared from the middle of 1837 till 1840. He also lectured in great towns; and he gave a regular course of instruction to young teachers at Blankenburg. § 12. But although the principles of the Kindergarten were gradually making their way, the first Kindergarten was failing for want of funds. It had to be given up; and Froebel, now a widower (he had lost his wife in 1839), carried on his course for teachers first at Keilhau, and from 1848, for the last four years of his life, at or near Liebenstein, in the Thuringian Forest, and in the duchy of Meiningen. It is in these last years that the man Froebel will be best known to posterity; for in 1849 be attracted within the circle of his influence a woman of great intellectual power, the Baroness von Marenholtz-Bülow, who has given us in her _Recollections of Friedrich Froebel_ the only life-like portrait we possess. In these records of personal intercourse we see the truth of Deinhardt’s words: “The living perception of universal and ideal truth which his talk revealed to us, his unbounded enthusiasm for the education and happiness of the human race, his willingness to offer up everything he possessed for the sake of his idea, the stream of thoughts which flowed from his enthusiasm for the ideal as from an inexhaustible fountain, all these made Froebel a wonderful appearance in the world, by whom no unprejudiced spectator could fail to be attracted and elevated.”