You will need to contact the owner's representative to arrange access.
In the case of this object this can be done by:
Writing to A E Millson at Royds Llp, 65 Carter Lane, London, Ec4v 5hf
Reporting A Data Error:
Reporting An Access Error to the HMRC:
Collection of chiefly 19th and 20th century correspondence
Maker:  Maker Unknown
Collection of chiefly 19th and 20th century correspondence, including letters by Queen Victoria (2), Edward VII (c.30), Queen Alexandra (c.20), George V (5), Wellington, Thomas Carlyle, Kaiser Wilhelm and the German Court, Count Alex Walewski, the Empress Eugenie, and others, with modern letters relating to art matters (including letters by Peggy Ashcroft, Stanley Baldwin, Henry Moore, John Piper, Ardizzoni, Gwen Ravarat and M.E. Sadleir, legal papers, accounts, bills, furniture inventories, and other family papers and correspondence, in the Muniment Room and in the Attic, partly listed by HMC in 1987, c.1760 onwards.
THIS ARTWORK IS LOCATED IN:Dorset
This may be one of a selection of objects that can be seen (by guided tour) as part of the Heritage Open Days Scheme operated by English Heritage in England. However, as numbers are limited, entry is by pre-booked ticket only. For further details and opening times see the attached link. At all other times access is by appointment. For further details, pre-booked tickets and appointments please write to John Montagu or Anthea Archdale at Mapperton House, Beaminster, Dorset, DT8 3NR. This object is available for loan to public collections for special exhibitions in the UK.