"Yes, you are a good student! Much nicer pics. I still can't make out the mark.
The sugar bowl has a concavity on one side which indicates something else sat up next to it, possibly a tea pot or creamer, from a set. The 2 or 3…"
"Ah, what do the plates and sugar holder look like?
All 3 of your pictures are out of focus. Irritating to look at.
To make the incised marks stand out take a pencil and a nail file or sandpaper and make some dust. Rub the dust into the…"