Many thanks for your doggedness.This is the right family, apologies for not making that clear & you are right with your definition of ‘jobbing’, a very common way of life for manual workers at that time.I agree with you over spelling variations, have come across many of those in other branches of the family tree (you wouldn’t believe how many ways there are of spelling Render!) so am prepared for it.
Michael certainly had a brother John; the 1871 census shows him unmarried and living with Michael.I’ve now looked at the 1911 census for John as you suggested and am delighted to have the confirmation of Mayo.
The Blewitt/Convey connection is an interesting one; I checked on Ancestry and found a marriage for Patrick Blewitt and Anne Convey for the 3rd quarter of 1853 in Newcastle upon Tyne, Northumberland.Also John Convey & Bridget Wilson married in Tynemouth, Northumberland in the 1st quarter of 1872.
Your suggestion of following John’s paper trail has merit although as Michael’s marriage cert. cites father’s name as James I hope John’s will also say James rather than John; also an email to the owner of the f/tree on Ancestry may be helpful.
Something to follow up now and a definite direction to follow, many thanks again.
Just had a thought - if Michael, John and Ann (who may be a sibling) came over together, did the whole family come over? Something else to checkout.