[6] In 1899, Macquoid produced decorations for the renovated St James's Theatre (demolished 1957-58) which were carried out by the leading London decorators Messrs. Morant and Co.[7] For the great collector Lord Leverhulme, Macquoid designed the 'Adam Room' for the Lady Lever Art Gallery, Port Sunlight, Liverpool.
The work was carried out by the London decorating firm of White, Allom and installed the year of Macquoid's death.
Macquoid had adapted principal elements from two documented Robert Adam houses: the plasterwork and colour of the walls derived from the Music Room at Harewood House, West Yorkshire, while the mirror above the fireplace is based on one at 20 St James Square, London.
[8] Following his marriage in 1891 to Theresa I. Dent, the couple built The Yellow House, Bayswater, London, to designs by Ernest George and Harold Peto.
In the May 1974 issue of Apollo, Ralph Edwards recalled his collaboration with Macquoid on The Dictionary of English Furniture.