The undercroft of the sacristy (afterwards enlarged) seems to indicate that the work must have been begun before 1250,[173] but the architecture of the aisle presents a beautiful specimen of the Middle Pointed or Decorated period, and dates before or about the beginning of the fifteenth century.[174] The cathedral, when entire, was a handsome red sandstone building, comprising a nave of four bays, with aisles 14 feet wide and round-headed windows; a choir, with aisles, lady chapel, west tower, quasi-transept, rood-turret, and to the north-east a vaulted chapter-house over a crypt. It stood on level ground, and commanded a fine view of the Moray Firth. When complete it must have been an architectural gem, and its mouldings have been said to show that in whatever other respects these remote parts of Scotland were barbarous, in ecclesiology at least they were on a par with any other branch of the mediaeval Church.[175] All that now remains of the cathedral consists of the south aisle of the nave, and the sacristy or undercroft of the chapter-house. No vestige remains of the various manses of the chapter that were within the cathedral precincts. The cathedral suffered at the Reformation, but was repaired by Bishop Lindsay in 1615, and in 1649 was not very ruinous. It would appear that the tradition is correct which says that the masonry of the walls was removed by Cromwell, like that of Kinloss Abbey, to provide material for the construction of his fort at Inverness. In the south wall there is a beautiful piscina, and in the north wall an ambry with a small stone penthouse; an octagonal baptismal font of remarkable design stands against the east wall of the aisle. There is a range of canopied monuments, which stand between the pillars on the north side. The east end had a large traceried window of five lights, and when complete it must have been very beautiful. The most famous of the bishops was John Leslie (1527-1596), who studied at King's College, Aberdeen, at Paris, and at Poitiers. He held offices both in the Aberdeen University and in the State, and in 1566 Queen Mary bestowed on him the Abbey of Lindores _in commendam_, and subsequently appointed him Bishop of Ross. He was a zealous supporter of Queen Mary, and, after her flight to England, followed her, and never afterwards returned to reside in Scotland. He was imprisoned in the Tower,[176] where he wrote two small books for her spiritual profit, which Queen Mary liked and endeavoured to turn into French verse. After his release he retired to France, where he wrote his _History of Scotland_. On the day before her execution, Queen Mary wrote to Philip of Spain, beseeching him to show kindness to the Bishop of Ross for his faithful and devoted services to her. The request was complied with, and he was able to end his days tranquilly in a monastery near Brussels. It is said that the bishop persuaded the Queen in 1565 to grant to all men a liberty of conscience.[177]