 Kọ itẹsiwaju fun paragirafi yii - Lakoko iṣọtẹ Jacobite ti 1715, Douglas gba ẹgbẹ Hanoverian, o si ṣe olori ẹṣin onisẹfẹ ni Ijakadi ti Sheriffmuir. Ni ọjọ ori, Douglas dagba eccentric, ati boya aṣiwere, pa Captain John Kerr ọmọ abinibi ti aburo rẹ, Oluwa Mark Kerr ni Douglas Castle, lakoko ti igbehin naa n ṣe alejo pẹlu rẹ nibẹ, ati pe o fi agbara mu lati sa fun igba diẹ si Holland. Ilé rẹ ní Douglas Castle ni àwọn Highlanders kó nígbà Ìdìbò Ọdún 1745 : ó ṣe tán. 