The Glamis Book of Record, compiled by Patrick 1st Earl of Strathmore between the years 1685 and 1689, contains, in addition to more mundane material, the Earl's autobiography. This, combined with other documents preserved in the charter room at Glamis, provides a remarkably detailed account of the Earl's building and other works at Glamis between the years 1671 and 1689, a short but crucial period in the long history of the castle.
In 1671 the castle, then little more than an empty shell, consisted of a massive tower-house, with additions and alterations mostly dating to the first few years of the century, attached to an east wing of earlier date. The single access crossed an encircling ditch and reached the entrance through a walled courtyard containing a miscellaneous collection of buildings, some possibly a good deal older than the castle itself.
The Earl, who was his own architect, began by drawing up a scheme for all his proposed improvements, which he then executed in stages over the years as circumstances allowed. The existing approach was replaced by an avenue with a series of ornamented gateways. The buildings in front of the castle were cleared away and replaced by an inner and outer courtyard with gardens and a bowling green, while necessary outbuildings were sited in a separate courtyard at the back of the castle. The existing east wing was matched by a new west wing to provide a symmetrical façade and the available accommodation increased by an addition to the east wing and extensions to the back of the tower-house, including a rectangular stair tower and three storeys of rooms with a chapel on the topmost floor.
Although the principal building works were carried out by local masons underthe Earl's instruction, the interior was decorated where appropriate by immigrant craftsmen of high standing. Thus, by the time the Earl died in 1695, he had converted a largely derelict, haphazard assemblage of buildings into a well-planned and seemly mansion environed with gardens and wholly appropriate to a Scottish gentleman of the period.