[2] Cust was born at Denton Hall to Victoria, Lady Welby, a philosophical writer and Sir William Earle Welby-Gregory, a politician and landowner.

[3][5] A detailed look at Nina and Harry, as individuals and as a married couple, can be found in 'Tangled Souls: Love & Scandal among the Victorian Aristocracy' by Jane Dismore (pub.

Cust was a direct neighbour of sculptor Jacob Epstein when they both lived at Hyde Park Gate in London.

[10] Cust's translation of 'Semantics; studies in the science of meaning' by Michel Jules Alfred Bréal presented the text's first appearance in English.

[3] Cust exhibited her sculpture at the Royal Academy in 1906 showing a bust of her niece and in 1927, part of a model of her husband.