Family correspondence Seven letters from Lockhart to his mother written whilst attending Amsterdam Medical Conference, 1 - 8 August 1930; four postcards from Lockhart to his mother, written whilst visiting Cambridge and London, 1916, 1917; correspondence and other papers regarding Lockhart's family history, 1949 - 1953; six postcards of Chapel of Bones, Kutna Hora, Czech Republic, pre-1951. 1916 - 1953