In 1917 he married Diana Granet, only child of the railway manager Sir Guy Granet, who was a director-general for railways in the War Office.
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The outbreak of World War I interrupted this promising start, however, and Denis, not fit enough for active service, worked in the War Office and the Board of Trade.
Saint-Denis | Denis Diderot | Saint-Ouen, Seine-Saint-Denis | Denis Leary | Denis | Seine-Saint-Denis | Claire Denis | Montreuil, Seine-Saint-Denis | Denis Halliday | Denis Healey | Charles Denis Bourbaki | Ruth St. Denis | Maurice Denis | Denis Thatcher | Denis Sassou Nguesso | Denis McLoughlin | Siméon Denis Poisson | Saint-Denis, Réunion | Gare d'Estrées-Saint-Denis | Denis Smith | Denis Piel | Denis Lawson | Denis Johnson | Denis Boyles | Basilica of St Denis | Villepinte, Seine-Saint-Denis | Saint Denis Street | Saint-Denis, Quebec | Saint-Denis-lès-Martel | Neil Denis |
Angela Thirkell, née Mackail, and her brother, Denis Mackail, both novelists, were treated to the stories of Mary de Morgan in their youth.