The Vestry stands in the south-east angle between the transept and choir aisle; it is a vaulted building dating from the fourteenth century, and is lighted by two windows, one looking to the east, the other to the south. A small door at the south-west corner opens upon the staircase leading to the Library—a chamber situated above the vestry. The collection consists chiefly of books left to the minster by will of the Rev. William Stone, Principal of New Inn Hall, Oxford, a native of Wimborne. They were brought from Oxford in 1686, under the care of the Rev. Richard Lloyd, at that time Master of the Grammar School at Wimborne. The books are chiefly works on divinity; some additions were subsequently and at various times made to the original collection. The books were attached to the shelves for safety's sake by iron chains, the upper end carrying rings which slid on rods fastened to the shelf above, the other end to the edge of the binding of the books. Hence the volumes had to be placed on the shelves with their backs to the walls. The room in which the books were placed was formerly known as the Treasury; it was refitted in 1857, but the old chains are still used. It would occupy too much space were any attempt made to give a list of the books. The oldest volume is a manuscript of 1343, "Regimen Animarum," [!--IMG--]
The lower part of the west tower is used as a baptistery; this is separated from the nave by a screen, formed of fragments of the old rood screen. In the centre stands the octagonal late Norman Font, supported by eight slender shafts of Purbeck marble, and a modern spirally-carved central pillar of white stone, through which runs the drain to carry off the water.