Sir Charles Douglas Blackett, 9th Bt. (1904-1968) (1904–1968) Parents Helen Katharine Lowther Sir Hugh Douglas Blackett, 8th Bt. Children Lucinda Mary Blackett Edward Douglas Blackett Caroline Ann Blackett Siblings Sir George William Blackett, 10th Bt. Rupert Henry Blackett Sir Francis Hugh Blackett, 11th Bt. Partners Ursula Mary Cely Trevilian