Hi Casalquida, thanks so much for responding.
I don't think your Newlyn's are same family as mine (although having said that not a very common name) but certainly you have my interest with the Newlands at Salutation Alley.
I have birth certificates for, I hope, my grandfather Henry Walter and his sister Emily Margaret. My grandfather was born at 2 Salutation Alley 1876, his sister earlier 1869 but at 20 Robert Street. Both were registered as Newlan, their Mother Elizabeth (nee King) made her mark, so presume she could not perhaps read either and wouldn't have known. The father William Newlyn (if it be the same William) remarried later to someone else and he also made his mark. In 1891 and 1901 Wm and new wife Jane were at 3 Cock Yard Woolwich.
Also, on the marriage cert of William's brother John (fishmonger) there is a note that he was mistakenly named as Newland on the cert (which I presumed to mean his birth cert). Unfortunately not been able to find birth record yet to verify.
Theressa Newlyn was a witness at my grandfather's marriage to Adelaide Emma Welch in 1899.
These Newlyns are really getting to me, have not been able to get moving for ages because of all the mis-spellings NewLAN, NewLAND, NewLYN, NewLIN etc etc but because you've found Newland at Salutation Alley and the connection there between my grandfather's birth record and the John Newlyn/Newland note on the marriage cert, must be the right family.
I am desperate to see that 1871 census record you mentioned but I can't find it. Did you by any chance download a copy of the record at Salutation Alley, Is there any way I can get a copy please - or can you give me the RG number and I can look for it by that means.
Can't thank you enough for this, might be the breakthrough I need.
Best wishes
Jan