Chart Clan Sinclair from Caithness across the world, from the Caithness and Sutherland Clearances of the 1810s to the great Sinclair emigration to Cape Breton, through the Scots-Irish migration to America, to Upton Sinclair, the Pulitzer Prize-winning novelist and Democratic candidate for Governor of California in 1934. Five waves of migration and six representative Sinclair journeys.