Papers of the Earls of Caithness: accounts, financial papers and correspondence Papers of Earls of Caithness: Accounts, Francis Sinclair and Ludovic Brodie, WS, Edinburgh, 1730-1751; Accounts, many paid by Ludovic Brodie for Francis Sinclair, 1744-1757; Papers, Royal Bank, Francis Sinclair and David Sinclair of South Dun and Ludovic Brodie, 1748-1759; Correspondence, Francis Sinclair and Ludovic Brodie, 1749-1758. 1730 - 1759