 On 12 May 1879 he wed Lady Frances Campbell , the fifth daughter and tenth of twelve children of George Campbell , 8th Duke of Argyll . The couple had met at a ball given in London by Lord and Lady Goschen , and married soon afterwards in St John 's Presbyterian Church in London . Frances 's father was shocked at their haste . Out of respect for Balfour 's mother , who had died in 1878 , the wedding was modest , with no formal meal and no honeymoon . 
