Born: December 28, 1857, Dunkeld, United Kingdom
Died: April 26, 1943 (age 85 years), Welbeck Abbey, United Kingdom
Books: Catalogue of the Printed Books in the Library of His Grace the Duke of Portland at Welbeck Abbey, and in London, The Manuscripts of His Grace the Duke of Portland, Preserved at Welbeck Abbey: Miscellaneous mss. of the Vere, Holles, Cavendish (Dukes of Newcastle) and Harley families, The Manuscripts of His Grace the Duke of Portland: Harley letters and papers (vol. 1), and more
Grandchildren: Lady Anne Cavendish-Bentinck, Andrew Wemyss, Lady Victoria Cavendish-Bentinck, and more
Spouse: Winifred Cavendish-Bentinck, Duchess of Portland (m. 1889–1943)