Finally! I looked out of my window after eating my dinner, to see whether the cats had eaten their wet food yet and were ready for a top-up. They had. And there were two small heads in the kibble bowl. At least two kittens, a ginger and I think a brown tabby with white feet. And Mama Violet, who spotted me, so I went ahead and brought out kitten kibble and more wet food; the kittens fled, after a bit of this way-and-that way finding their way under the car, while Mama Violet stood her ground, hissing, then started scarfing the wet food as I withdrew. Unfortunately when I looked again five minutes later, there were no kitties to be seen and a large raccoon was devouring the kibble, so I brought in that bowl. (Last night's bandit was a youngster, so I didn't shout at it. Tonight's required a dressing down and an eruption of barking to leave.)
... Just looked again and the kitties are back: a tortie kitten is eating :-)
... Just looked again and the kitties are back: a tortie kitten is eating :-)