Why did Dr. Dee quit Manchester?

In the *Penny Cyclopædia*, art. DEE, JOHN, I find the following statement:— "In 1595 the queen appointed Dee warden of Manchester College, he being then sixty-eight years of age. He resided there nine years; *but from some cause not exactly known, he left it in 1604*, and returned to his house at Mortlake, where he spent the remainder of his days." Can any of your correspondents assign the probable causes which led to Dr. Dee's resignation?