The collection contains diaries, material relating to Thomason's work with the Zetland County Council and Shetland Island's Council, photographs, material relating to Shetland devolution and the Shetland Movement and some personal papers.
Includes notification of appointment of Mrs E. Blance as next-of-kin, July 1917; notification to Mrs Blance of separation allowance and allotment of pay, 20 July 1917; treatment certificate of Harry Blance, Scottish General Hospital, 5 June 1918; discharge certificate of Harry Blance, Gordon Highlanders, 27 June 1918; character certificate of Harry Blance, 27 June 1918; baptismal certificate of Harry Blance jr, Lerwick Parish, 1 September 1918; soldier's service and pay book of Harry Blance, 1941-1945; soldier's release book of Harry Blance, 12 January 1946; member's ticket, Shetland Literary and Scientific Society, 1946.