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 D.j.r. Robinson at Forsters Llp, 31 Hill Street, London
Reporting A Data Error:
Reporting An Access Error to the HMRC:
Cameo collection - no.34 Portrait head
Maker:  Maker Unknown
Cameo collection - no.34 Portrait head, known as M. Brutus, sardonyx (tip of nose and parts of background restored).
THIS ARTWORK IS LOCATED IN:Lincolnshire
This item is available for viewing by appointment through the contact shown