[1] The group's foremost member, William Waldorf Astor had declared that America was "no longer a fit place for a gentleman to live" and had moved himself, his family, and his $100M fortune to England in 1891.

[3] At this time Ashorne, described as “the Bletchley Park of the steel industry”, was managed by Major John Howard Alexander, the inventor of the spear-point pump, used in the Sinai and Palestine campaign.

[11] Nikolaus Pevsner, in his Buildings of England volume, Warwickshire, described Ashorne as "clearly on the way to the Lutyens style", while Chris Pickford, in the revised 2016 edition, sees comparisons with "contemporary American mansions on Long Island and in the Hudson Valley".

[13] The interior is decorated in a medley of opulent styles; Pickford and Pevsner record the “Neo-Jacobean galleried hall, classical drawing room and Rococo boudoir“.

[3] Historic England notes that the large overmantel above the fireplace in the great hall was originally decorated with plaster reliefs of a "tree, figures, portrait busts etc."