Hi Sue, Raylen and Judith
Thanks ever so much for that extra information.
Re the two Johns:
I think, but can't yet prove conclusively, that William Burns Landells and Adam Landells are brothers. Adam also had a son, who died on the journey to Australia, called William Burn Landells, and I originally thought the William Burns mentioned in newspaper reports was another son born in Australia and given the same name, until I came across further details. Both Adam and William Burns were Non-Conformist Ministers at some point, and both were born, as far as I can tell, in Alnwick, Northumberland, around the early 1800s.