Two seals, of which one is only fragmentary. The other one is the seal of Robert Blackadder, Bishop then Archbishop of Glasgow.
The seal represents St Kentigern with nimbus, wearing episcopal vestments and a mitre. With his right hand he holds a salmon with a ring in its mouth, and with his left hand a crozier. he stands wihtin a niche of Gothic style with a pinnacled canopy and flanking side niches, supported upon pillars. Beneath the niche is a heater-shaped shield bearing arms: three roses on a chevron. The legend is within a raised border: S' ROTUDU ROBERTI EPI GLASGU.
The document neat, angular cursive with some pre-secretary hand elements such as the final s looking like a Greek sigma, the p looking like an x, the attacking stroke on a. The first letter is ornamented, and the first word are written in bookhand.