The wording and ornament of the title pages suggest a division into three groups:
(i) Adv.MSS.35.2.5, 35.3.6, 35.3.7, 35.39: 1738-1739.
(ii) Adv.MSS.35.3.2, 35.3.4: 1740.
(iii) Adv.MSS.35.3.3, 35.3.5, 35.3.8: 1740-1744.
The sources are mainly the original manuscripts then in the Advocates` Library, with notes taken from Richard Augustine Hay`s works. Only those documents the present location of whose originals is unknown are indexed in detail.