Lady Mary Johnstone Peerage person ID=23134 (1627–1675) Parents James Johnstone, 1st Earl of Hartfell Lady Margaret Douglas Children Fergus Graham Reginald Graham James Grahme William Graham Richard Graham, 1st Viscount Preston Siblings James Johnstone, 1st Earl of Annandale and Hartfell Margaret Johnstone Lady Bethia Johnstone William Johnstone Lady Janet Johnstone Partners Sir George Graham, 2nd Bt. Sir George Fletcher, 2nd Baronet