 The Roseberys divided their year among their various homes : London for the social season and parliament , Mentmore at weekends to entertain both political and shooting house @-@ parties . In August the household would move north to Dalmeny for the grouse shooting . In between , occasional days and the <unk> Derby meeting would be spent at their home " The <unk> " in Epsom . Though small by comparison to their other homes , this mansion was described by Henry James as the most <unk> and comfortable of the Roseberys ' many homes and as a delightful house full of books and sporting pictures , with just a few <unk> and <unk> . Together the Earl and Countess of Rosebery added greatly to not only the Mentmore collection but also to that housed at Dalmeny House , Rosebery 's Scottish seat , amassing a great library of rare and continental volumes and a collection of artefacts formerly belonging to the Emperor Napoleon I. 
