Mary Constable-Maxwell person (1801-1857) (1802–1857) Parents Theresa Apollonia Wakeman Marmaduke William Constable-Maxwell Children Charles Joseph Langdale Constance Mary Langdale Arthur Joseph Langdale Frances Mary Langdale William Joseph Langdale Henry Langdale Siblings Theresa Constable-Maxwell Joseph Constable-Maxwell William Constable-Maxwell, 10th Lord Herries Henry Constable-Maxwell-Stuart, 16th of Traquair Peter Constable Constable-Maxwell Marmaduke Constable-Maxwell of Terregles Partners Charles Langdale