Hello Matthew, In my family tree I have Thomas Lamble who married Flora Blyth Campbell. His brother William Lamble married Flora's sister Isabella Campbell. These marriages were in the 1860's in Christchurch. I wondered if this might fit in with your information. I looked for your Arnold Lamble in the bmd's and I think he was born in Edmonton. This is where Wilhelmina Lamble, daughter of Isabella and William, married Charles Dyble.