 After a course of lectures in that city he was again forced to spend some time in a hospital with valvular heart trouble.Upon his recovery, still undaunted, he once more took up his work of lecturing in the northwestern part of the United States.In the fall of 1907, during a most successful period of lectures in Minnesota, he travelled to Berlin (Germany) with his friend Dr. Alma Von Brandis, who had been for months trying to persuade him, in order to hear a cycle of lectures by Rudolf Steiner.