Hi again Peewee,
I've been puzzling over your puzzle - and taking Hackstaple's wise words to heart.
You really have very little definite information, do you, at present. So is there anything at all you can do to try to get any further information? The only thing I can think of is to purchase all possible certificates just to see whether there is anything which might add another snippet.
Firstly Samuel's death certificate and then the birth certificates of William, Maurice, Joseph and Edward.
You never know - there might be some helpful clues e.g. address and occupation on the birth certificates (especially the earlier ones in Enfield), informant on his death cert. But, of course, there may well be nothing that will help - however, at this stage, what other possibilities are there?
A couple of comments on Rome.
1. The description 'Rome England' in the 1881 census seems very odd - normally one would expect the county to be named. But I guess everything we say about that entry is just speculation.
Anyway, I looked at some other pages completed by the same enumerator. His spelling is poor- and time and time again he simply omits the name of the county altogether (presumably the householder had not provided it and this enumerator didn't have a clue where the various places were).
So perhaps when he came to copy the entry into his enumeration book from Samuel's householder schedule, he read the place (correctly or not) as Rome and either the county wasn't named or he couldn't decipher it - so perhaps he added 'England' as a clarification because he was sure that it wasn't Rome, Italy?
Did he ever add 'England' to other entries? Well, I haven't gone through the whole 100 pages

but I did see one entry where the birthplace is given as 'Eng, Gosport' (George Will Cannon on page 1)
Did he use the names of other countries? Did he himself ever use the term British subject? Yes. I noticed several entries for just 'Scotland' and/or 'Ireland'. Also the following on page 28:
Weiss family, birthplace Werrt?emberg, Germany.
William Anwyl, birthplace Port Louis Mauritius Brit Sub.
I noticed another entry where he had recorded 'naturalized British Subject'.
2. The Rome found by ec is very tiny on the map - looks like just a couple of buildings. This is confirmed by Genuki which at:
Click Heredescribes the places in the parish of Giggleswick in 1822 including the following:
"ROME, a farm-house in the township and parish of Giggleswick, 2 miles from Settle."
3. There's also a Rome in Angus (Forfarshire) in Scotland! But this too looks like just a single farm.
Good luck
JAP