I'm sorry! I know that this question has been asked a million times. I have searched out all the relevant posts I can find on the subject. As well as all of the answers that I can make head or tail of. But still the pictures won't go. I have tried removing them from the gallery, Media, Storage. In fact everywhere I could find in 'Settings'. I think that they've gone. But then they always sneak back later.
Why can't it be like the iPhone? Edit-Select-Remove Poof! Gone for good.

I shall now hide under the table, expecting incoming flak at any time.