Caroline Emilia Mary Herschel was the daughter of Sir John Frederick William Herschel, 1st Bt. She married General Hon. Sir Alexander Hamilton-Gordon, son of 4th Earl of Aberdeen, on 9 December 1852. They had ten children.
She may have been acquainted with JW about 1874.
Mosley, Charles, ed., Burke's Peerage and Baronetage, Switzerland, 1999, p. 10; http://www.thepeerage.com (accessed 2004.06).