 Of Hannah Rosebery 's homes , the lease on Lansdowne House was surrendered shortly before her death , when the Roseberys purchased 38 Berkeley Square . This property was transformed into one of London 's most luxurious town houses . However , Lady Rosebery did not live to see the work completed . Her son Harry sold the house in 1938 , and it was demolished . A year later a bomb landed on the empty site during World War II . The <unk> was bequeathed to her daughter , Sybil , in 1929 and was sold together with its contents in 1955 . Lord and Lady Rosebery 's library there was given to the nation at this time . Mentmore , the grandest of the Roseberys ' homes , was sold by Lady Rosebery 's grandson , the 7th Earl of Rosebery , in 1977 , together with the Rothschild art collection , which Lady Rosebery had not only been intensely interested in but had enlarged considerably . She personally <unk> the collection , and <unk> wrote in the preface " In time to come , when , like all collections , this will be dispersed ( and I hope this will be long after my death ) this book may be of value . " Her two @-@ volume work and the collection it described remained so unknown that " Save Mentmore " ( a group attempting to halt the sale of Mentmore to keep the collection within Britain ) failed largely due to widespread public ignorance of both house and collection . A few pieces of furniture and paintings were taken to Dalmeny , ( the only house to remain in the family ) where they are displayed today , and three pictures including <unk> ' Madame de <unk> were purchased for the National Gallery . The remainder of the collection was dispersed in a week @-@ long sale and is now scattered across the globe . A further sale of the " Continental Library , " to which she had added , was conducted in 1995 at the <unk> Hall , London by <unk> 's . 
