The sale was held at nearby Gorringe’s (21% buyer’s premium) of Lewes on January 8, nearly three years after Sotheby’s dispersed the bulk of the collection for £8.86m.
It featured residual pictures, silver, ceramics and furniture from the estate’s attics, sculleries and outhouses, mostly assembled by Gascoigne’s late great-aunt, Mary Innes-Ker, the Duchess of Roxburghe.
The 10 x 7in (25 x 18cm) Osborne drawing was, however, purchased from The Daniel Egan Gallery in Dublin by the duchess’ father, Robert Crewe-Milnes, 1st Marquess of Crewe (1858-1945), and appears in a 1938 inventory of West Horsley Place. It led the picture section, selling marginally over its £500-800 guide for £850.
Elsewhere, a clutch of works by London-born painter Adrian Daintrey (1902-88) was topped by a 1936 oil on canvas of Bembridge Harbour on the Isle of Wight, which also made £850.
Two other 1930s subjects painted during his travels to France sold for £320 and £200 respectively.