Of this, though, Dee for the moment happily knew nothing. Nor, for all his long intercourse with the spirits, was he able to foresee that he was now embarking on a career of tragic adventure that falls to the lot of few scientists. At first, however, all went well enough. Lasky entertained his learned guests in lavish fashion, and, assuming their garb of long, flowing gown, joined heartily with them in the ceremonies of the seance room. But as time passed and their incantations redounded in no way to his advantage, he gradually lost patience, and broadly hinted that they might better transfer their services to another patron. Whereupon, closely followed by the irrepressible Kelley, Dee removed to the court of the emperor, Rudolph II, at Prague. He had dedicated one of his scientific treatises to the emperor's father, and in his simplicity firmly believed that this would insure him a warm and lasting welcome. But Rudolph, from the outset, showed himself far from well-disposed to Dee, Kelley, and their attendant retinue of invisible spirits. When Dee grandiloquently introduced himself, in a Latin oration, as a messenger from the unseen world, the emperor curtly checked him with the remark that he did not understand Latin. And the next day a hint was given him that, at the request of the papal nuncio, he and Kelley were to be arrested and sent to Rome for trial as necromancers. Before night-fall they were in full flight, to remain homeless wanderers until another Bohemian count, hearing of their presence in his dominions, took them under his protection on the proviso that they were to replenish his exchequer by converting humble pewter into silver and gold.