The western portion of the grounds were purchased about 183r)-3() by the Catholic Diocesan Theological Seminary. The old Corsa, Watts and Brevoort homestead still stands on the premises and is now used as the infirmary, while Rose Hill, the former residence of, and built by, Mr. Mowatt, of New York, a fine large stone building with brick wings, which have been subsequently added, includes the residences of the professore, the reception parlor, refectory and chapel.

St. John's Hall, originally used as the Theological Seminary, is on the westernmost part of the premises. It is a Gothic building and was erected about 1836--41. It is now devoted to the class-rooms, dormitories and school-room of the students of the Preparatory Department. The entrance, porch of this ball is a fine specimen of architecture, the arch resting upon pediments very curiously carved in stone representing the eagle of Saint John, the ox of Saint Matthew, the angel of Saint Luke and lion of Saint Mark.

The ground-floor of this hall is now occupied by the laboratory and chemical lecture-room of the college and the museum, containing niineralogical aud conchological specimens, electric, optical and other scientific implements. The collection of corals is as fine as any in this country. The class-rooms and study-room are cheerful and well ventilated, and the dormitories models of neatness and order.

Just east of St. John's Hall stands the Chapel of St. Mary, which is used as the parish church for those in the vicinity of the Catholic faith. It was built about 1841, and is a well-proportioned structure. It is ornamented on the east and west sides with six brilliantly-colored stained-glass windows, imported many years ago from Europe. Saints Peter and Paul flank the altar, and the four evangelists fill up the other well-turned Gothic windows. One of the fathers officiates as parish priest.