This response is rather late and I suppose that you have already found what you want. Nevertheless, James Campbell was born in Aird Lamont House, in Kilfinan parish, Cowal, on 19 December 1836 and he was christened on 6 March 1837. His parents were Thomas Campbell Esqr and Mary Flora Campbell. Other children were Helen Flora Campbell, born Airdlamont, 3 march 1839, christened 26 April 1839; and Archibald Niel Campbell, born Rothesay, Bute on 26 September 1835, christened 17 December 1835. I hope this helps.