Joan Collier Sinar, later Ferguson, FRHistS (1 May 1925[1] – 18 January 2015) was an English archivist who set up the county record offices for Devon and Derbyshire.
She was educated at Leigh Girls' Grammar School and at Somerville College, Oxford University, where she studied Modern History.
[2] She began work in 1948 as an assistant archivist at Staffordshire Record Office (established a year earlier).
[2] She was also active in the Church of England, and was admitted a lay reader in the Diocese of Derby in 1991.
The couple lived successively in mid-Derbyshire, in Wiltshire (where they married, in 2002), in southern Spain, and finally near Newtownards, County Down, where Sinar died in 2015.