Eglinton was the most notable post-Adam Georgian castle in Ayrshire. Amongst many items of interest, the castle contained a chair built from the oak timbers of Alloway kirk and the back of the chair was inlaid with a brass plaque which bore the whole of Burns' poem "Tam o' Shanter". This was sold at an auction in 1925. The previous Eglington castle (sic) was described circa 1563–1566 as a "fare castell, but noo strength againsts any power." An escape tunnel is said to run from the old castle to the area of the rockery on the castle lawns. The appearance of the old waterfall may have inspired this story as it looks like a sealed doorway. The total acreage of the Earl of Eglinton's holdings was 34,716 Scots Acres (1 Scots acre = 1.5 English Acres) in 1788. This included Little Cumbrae, and lands at Southannan and Eaglesham (Polnoon).