Sir Robert Andrews Mackenzie-Douglas, 2nd Bart. Of Glenbervie 

Martha Elizabeth Rouse was born in 1811. She died in 1899. They had the following children:

• Sir Robert Andrews Mckenzie-Douglas, 3rd Bart
• Kenneth, 17 Oct 1842 - 23 Dec 1896, who married in New Zealand and was father to Kenneth, 4th Bart
• Lady Elizabeth Mackenzie-Douglas was born on 10 May 1840 in Stone Tng., Mahébourg, Mauritius. She was christened on 14 Jun 1840 in Protestant Church, Port Louis, Mauritius. She was buried in Buckland Monachorum, Devon. 

  She married Sir Francis George Augustus Fuller Eliott Drake 2nd Bart on 06 Aug 1861. He is, presumably, a descendant of Sir Francis Drake.

  She wrote a two volume family history, " The Family and Heirs of Sir Francis Drake".

  • They had the following child:

Lady Elizabeth Beatrice Fuller Eliott Drake was born on 07 Jul 1862. She died on 09 May 1937 in Buckland Abbey, Yelverton, Devon. She was buried in Buckland Monachorum, Devon. She married John Reginald Upton Eliott Drake Colborne 3rd Lord Seaton on 22 Jun 1887.