Thanks for the reply. Yes, he is proving a hard man to find the roots of. My gut feeling is he is the one in the Cosford home and maybe the William baptised there in 1837. I think we need to try and get the baptism details to rule him out. I don't think he is the son showing with Charles as the census was taken after his birthday that year, so he would be 15 not 16, although maybe he wasn't sure what year he was born. I think we need to try and get info on James, Mary Ann and Charlotte, who were in the home with him, and this might lead us to more info.
You said you heard he lived with an older brother, do you know any more on his background before he married Jane? I think he probably met Jane through her brothers Charles and George, as they worked in the brickfields in Darfield and Charles appears to have also worked as a bricklayers labourer.
I am descended from Alice Jane Cuthbert, through Violdet Mildred Carruthers. What line does your son-in-law come down from?
I have quite a bit of info. on the Hoare family, if you want it and also did you find the 2 children William and Jane had in the UK before they came to NZ that died over there? Their names were William and Alice and no doubt you have Beatrice who died soon after their arrival in NZ.
If I find out anything more, I will let you know.