It's hard to tell from the map but I think it possible there were as many as 10 dwellings in the 4 buildings, but still nowhere near a city!
The maps don't always show the boundaries between the properties as, quite often, there would be no physical boundary on the ground. My gran's garden boundary was a grass path which she and her neighbour both used to access the vegetable gardens either side - you didn't need a fence to keep the neighbours kids out - we knew it was the boundary and didn't stray across
The ponds were often where the clay was dug out to build the house - when no longer needed for water supply they often became dumps for all kinds of rubbish, I spent many happy childhood hours digging bottles and marmalade jars out of such dumps
I did wonder about the City name. It could be a bit of Suffolk humour, but possibly a corruption of a name of a family or something similar.
Not sure if you noticed, but if you follow City Lane northwards past Hill Farm you get to "Nan True's Hole". I'm not even going to try to speculate what that might be about
