Wyatt, Matthew Digby [1820-1877] May 1850 letter signed as Secretary of the Great Exhibition, to the Secretaries of the Mechanics' Institute, Sheffield, discussing the arrangements for 'the Lectures which Her Majesty's Commissioners have authorised.....' on 'Great Exhibition of the Works of Industry of all Nations, 1851' letterhead paper, from the Office for the Executive Committee. Accompanied by a small printed example of the certificate which accompanied a medal awarded to R.Atkinson, 'for the services he rendered to the Exhibition.' (2 items).