vaults carried to a considerable height, but cut off from the crossing, as at Ladykirk and Queensferry, by the arches introduced to carry the central vault of the crossing. As the church was without buttresses, the walls are of considerable thickness (not less than 4 feet) in order to resist the pressure of the arches. In the north wall of the south transept, near the apex of the roof (see Fig. 1233), there is a small door, now built up, which probably gave access to a small chamber in the haunch of the vault over the crossing.
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Fig. 1232.—St. Bothan's Collegiate Church. Plan.
In the east wall of the north transept there is a piscina (Fig. 1234), enriched with carved crockets round the ogee arch. The basin is, as usual, broken away. On one side of the arch is a shield, having a smaller shield on the dexter side, bearing three inescutcheons, and on the sinister side three cinquefoils, being the arms of Hay of Tweeddale.
The piscina is 22-1/2 inches wide, measuring over the enrichments, by