The chair crests are enriched with fretted arcading as featured in one of Robert Manwaring's 'Gothic Chair' patterns illustrated in A Society of Upholsterers: Genteel Household Furniture in the Present Taste, 2nd ed. c. 1765 and in Manwaring's own Chair-Maker's Guide, 1766 (E. White, Pictorial Dictionary of 18th century Furniture Designs, p. 73, pl. 23).
A closely related 'child's chair', formerly at Yester House and possibly by Charles Douglas, the house carpenter at Yester employed by the Marquess of Tweeddale from 1732-1749, is illustrated in F. Bamford, A Dictionary of Edinburgh Wrights and Furniture Makers, Leeds, 1983, pl. 19.