The contents are as follows:

(i) Correspondence, 1742-1786, undated, including political material and correspondence of Major William and Lady Catharine Hay (folio 1);

(ii) Correspondence, 1755-1770, concerning Board of Police business - largely patronage (folio 148);

(iii) Correspondence, 1774-1787, concerning Scottish peerage elections, being chiefly letters soliciting votes (folio 181).