Thanks, battista for letting me know that there is no grave stone. If there was I would have popped along at some point as this cemetery is on my bus route to and from work.
I still think it might be possible one day to discover what became of Giovanni although this is not proving easy at all. Hopefully, he might emerge in the updated digitized records one day. Or he might even be discovered in the burial records over here - possibly under a different name. There might be some clues which might be able to identify him. After all, when 'Frank Victor Spence' died there have been clues which show something is not right. If he was really the brother-in-law of Georgina, he could not be attributed with the family members of the Battistas. If he was really Vincent then why does he have a different name? It almost goes without saying it is impossible for two men to morph into one.
Sometimes, when I am looking at burial records especially Elswick I sometimes come across an entry for an unidentified body which has been found. Although, hopefully Giovanni won't have been one of these unidentified ones. You would think if he just went missing someone in the family might have reported it to the police and if the latter thought that one of the unidentified bodies might have been him a family member might have been asked to come and identify it.
This is all very puzzling what happened to Giovanni but I think there is still hope.
That would be good in you could ask about the records Christine. I am curious too as to what may have happened to them. It was disappointing to find the other day that the marriages at Tyne and Wear Archives for St Augustine only go up to 1901 whereas on the Marriage Locator website the June quarter for 1910 is represented so someone must have got their hands on them at some point.
I have just been thinking Boo, on the link you have provided Ann's Father is mentioned as Henry Fenton but there doesn't seem to be a mention of the groom's father. I hope it turns out that Francis named a Father on the marriage. I hope we will not get thwarted again in trying to find out who this man was.
https://www.flickr.com/photos/illustratedchronicleww1/21265796373/in/photolist-ypbLnBIt might be coincidence, that there were two people called 'Francis Spence' who were in the North Shields area at one point and who were both miners - the mining industry was huge in this area at the time - but it will be good if things can be established one way or the other.