Galileo, finding that Urban, with all his friendly feeling towards him personally, would never be persuaded to revoke the decree of 5th March, 1616, resolved to return home after a stay of six weeks at Rome. There was little to be gained by remaining longer. As soon as the attitude which Urban intended to assume towards the prohibited doctrine became evident, Galileo’s clerical adherents as far as possible avoided expressing themselves on the subject, and the moderate party among the Romanists merely advised him to take care that his scientific speculations did not contradict Holy Scripture. Father Nicolo Riccardi, who was much attached to Galileo and took a great interest in his subsequent trial, was very ingenious in maintaining a safe neutrality between the two systems. This good man, to whom from his eloquence, or as others said because he was so fat, the King of Spain had given the nickname of “Il Padre Mostro,” prudently agreed neither with the Ptolemaic nor the Copernican system, but contented himself with a view as peculiar as it was convenient. He saw no difficulty in the stars being moved, as we see them to be moved in the vault of heaven, by angels, a proceeding which demanded nothing on our part but wonder and admiration.[197] Meanwhile Galileo’s stay at Rome had been of essential service to science, although in quite a different way from that which he intended on his arrival. In 1622 a certain Jacob Kuppler, from Cologne, came to Rome with a microscope made by a relative of his, a Dutchman of the name of Drebbel, in order to lay the new discovery, of which Drebbel claimed to be the inventor,[198] before the papal government. Kuppler, however, died before he had an opportunity of exhibiting his instrument to the court. Soon afterwards many other microscopes were sent to Rome, where, however, no one knew how to use the complicated instrument. Galileo not only at once perceived its use, but greatly improved it.[199] He afterwards sent many of these improved instruments to his friends, and before long his microscopes were in as great request as his telescopes.[200] In order to rectify a mistake that has been often repeated, that Galileo was the inventor of this instrument of such vast importance to science, we mention here that he never claimed this merit himself; it was his eulogist, Viviani, who first claimed it for him, and his thoughtless followers have repeated it. Galileo had indeed, as he mentions in his “Il Saggiatore,” discovered a method of using the telescope to magnify objects as early as 1610, but it required an over-zealous biographer to claim Galileo as the inventor of the microscope from this. It was, however, he who, in 1624, brought the microscope to a degree of perfection on which for a long time no advance was made.