I have Peter Campbell and Mary (ms Campbell) married 10 July 1834 (OPR Marriages 360/00 0040 0213 Kenmore). Peter left East India Docks, London on the 7th June 1865 and arrived at Lyttelton, New Zealand on "Tudor" , a 1786 ton ship, 24 September 1865 with his wife, aged 53 and 6 of his children, (COLIN 17, JOHN 15, MARY 13, MARGARET 11, ISABELLA 9 and CHRISTINA 29) son-in-law (Peter 29) and 1 grand child (ISABELLA 9months) . Also on board the TUDOR listed apart from the rest were daughter ELIZABETH and her husband ROBERT FERGUSON and their daughter JANET BRUCE.
Regarding Duncan: From Peter's will filed in the Christchurch Court on 7 August 1885 describing how his properties were to be divided up it stated the following: "Colombo Road, Sydenham to Elvi Campbell, widow of son Duncan Campbell who died in Russia ca 1883."