FOURTH YEAR: _Recapitulation of previous studies, with Astronomy, Cosmography, and other portions of Physics, and Disputations and other preparations for the Laureation_. Among the books used in this year were the _Sphæra_ of Joannes a Sacro Bosco, the books of Aristotle _De Cælo_, _De Ortu_, _De Meteoris_, and _De Anima_, and Hunter’s _Cosmography_. Atlases and the celestial globe were also in requisition, and the most notable constellations were pointed out in the heavens themselves. But much of the work of this session consisted in logical disputations in the evenings, whether among the magistrands, or between them and the third year’s men.—On Sundays, instruction in Dogmatic and Polemical Theology. To return to Rollock personally:—We have spoken of him hitherto as only the first regent or Arts professor of Edinburgh University. In reality, however, since February 1586, when he was in his third session and had Nairne as his single fellow-regent, he had borne, along with his regency, the higher dignity of the PRINCIPALSHIP,—the Town Council having concluded that the time had come for the institution of such an office in the University, and for Rollock’s promotion to it. Accordingly, when Rollock had the satisfaction of seeing the forty-seven students who had gone through their full four years’ curriculum with him made Masters of Arts, he was not only senior Regent, but also Principal of the University, with a right of superintendence over Colt and Scrimgeour, the other two regents. But no sooner had this first Edinburgh graduation taken place than there was a further change. Rollock, satisfied with having taken one class of students through the full course of four years, resigned his regency or Arts professorship, in order to become Professor of Divinity. As it was desirable that those of the new graduates and others who might be going forward to the Church should have the means of a theological education within Edinburgh, this was a natural arrangement. It amounted to the institution, though on a small scale, of a Theological Faculty in the University, in addition to the general Faculty of Arts or Philosophy. The Theological Faculty was represented solely by Rollock, who was also Principal of the University; while the Arts or Philosophical Faculty was represented for the time in Colt, Scrimgeour, and a third regent, Mr. Philip Hislop, one of Rollock’s recent graduates, appointed to the place which Rollock had just left vacant. In 1589, however, Mr. Charles Ferme, also one of Rollock’s graduates, was added to the staff of regents, so as to complete the number of four, necessary for the full conduct of the Arts classes.