The aisle, the walls of which have not been rebuilt, and which has a chequered pavement of uncertain date, was for some centuries the burial-place of the owners of Studley Royal, and is often called the Mallory Chapel. A curious recess in the south wall is concealed by the monument of John Aislabie of Studley, Chancellor of the Exchequer at the time of the South Sea Bubble, and against the north wall is a monument to that Sir John Mallory of Studley who defended Skipton Castle for Charles I., and delivered Ripon from Sir Thomas Mauleverer. There is a square aumbry to the right of this monument, and in the next bay another, divided by a stone shelf and having modern doors with ornamental iron-work. The northern bay is almost wholly occupied by a stone staircase leading up to two doors, one of which opens on the left into a chamber now containing the bellows of the organ, while the other opens into the Lady-loft or Library. Over the latter door and over the Mallory monument will be observed traces of two original windows, which, before the erection of the Lady-loft, admitted doubtless whatever light was not blocked out by the old roof of the Chapter-house. On this wall hangs a royal escutcheon bearing the motto of James I. The vaulting is Perpendicular, but two of the original supports remain on the east side. The shaft in the south-east corner resembles those in the Markenfield Chapel, save that its capital has no foliage; but between the two bays, instead of two shafts flanking the respond of a thick cross-arch, there is a cluster of three detached shafts, banded at the string-course, and sharing a common capital with a semi-octagonal top. It would seem, therefore, that the two bays here were never walled off from one another.[90] At the north-east corner the vaulting springs from a Perpendicular corbel. Its moulded ribs are exceedingly ponderous, and one of them, not having room to descend upon the pillar, is finished off with a head. The present Library staircase was put up by Sir Gilbert Scott in place of an older flight attached to the north wall, and upon the latter may be seen (behind the stairs) traces of mural paintings in red and green, representing the Adoration of the Magi and other subjects. The archaic character of these paintings indicates the age of the wall, which, nevertheless (unlike the corresponding wall in the Markenfield Chapel), seems to have been an afterthought, since it differs from the other walls in the coursing of the stone and in the pattern of the string-course, and, moreover, at its northern end there is a 'straight joint,' visible in the choir-aisle.