The More House Archive consists of the family archive of the Hope-Nicholson family, who lived at More House at 52 Tite Street in London for a century beginning in 1892. The house was purchased by Adrian Hope and Laura Troubridge and the house archive contains materials produced by them, their daughter and son-in-law Jaqueline and Hedley Hope-Nicholson, and grandchildren (particularly Marie-Jaqueline Lancaster and Felix Hope-Nicholson), as well as other members of their extended Troubridge, Hope, Gurney, Nicholson and Cleghorn families. Materials comprise correspondence, diaries, photographs, literary manuscripts, original art and business papers, dating from the early 17th century to late 1990, though the bulk of material dates from the 1870s to the 1940s. The Troubridge, Hope, Gurney and Hope-Nicholson families were very well-connected across a variety of disparate social circles and fields. As such, materials relate to a large number of topics including Pre-Raphaelite and aesthetic arts, diplomacy and the military (particularly the Crimean War), royalty, politics, the gay and lesbian avant garde, religious figures, journalism, country life, amateur and professional theater, interior decoration and education.

Family members well-represented here include Laura Troubridge Hope, Jacqueline Hope-Nicholson, Hedley Hope-Nicholson, Marie-Jaqueline Lancaster, Felix Hope-Nicholson, Una Taylor Troubridge, Alfred John Nicholson, Mary Cleghorn Nicholson, Amy Troubridge, Helen Troubridge Bate, Robert Bontine Cunninghame-Graham and Thomas W. Allen. Correspondents and friends of the family circle represented in the collection include Oscar Wilde, Cyril and Vyvyan Holland, John Betjeman, George Kolkhorst, Queen Victoria and the Royal Family, Radclyffe Hall, Trelawny Dayrell Reed, C.K. Scott-Moncrieff, Lord Alfred Douglas, Edward Burne-Jones and family, the de Bunsen family, John Millais and family, Edward Scott-Snell, Harold Nicolson and Ada Leverson, to name only a few.

Many of the original housings and containers in which this archive was stored have been retained in the More House Archive at the Clark. Normally, most original boxes and containers would be discarded during processing, but in the case of this archive, the Clark staff decided that the way the archive was collected, curated and stored was an important part of its overall story. The collecting habits of the Troubridge-Hope-Nicholson's are a very significant part of the provenance of the archive, and it was deemed important to keep some record and evidence of how they curated the archive when it was in their posession.

A family tree of the Troubridge, Hope, Gurney and Nicholson families is viewable online.