She was the sister of his friend Dr David Christison .
In 1858 , he married Agnes Montgomerie Cameron ( d. 1914 ) , granddaughter of Prof Alexander Christison and niece of Robert Christison .
Agnes Montgomerie Cameron was the granddaughter of his friend Dr David Christison .
In 1858 , he married Agnes Montgomerie Cameron ( d. 1914 ) , granddaughter of Prof Alexander Christison and niece of Robert Christison .