They came back a few minutes later

Oh, my. In searching for one book, to get the data I needed to answer a business issue, I brush across A Collection of Essays by George Orwell which I purchased some months ago. I do like Orwell's work. With a total absence of any sort of biblio self-control, I of course had to free it from the shelf, if only to glance through it. What an excellent collection. From Marrakech, the opening sentence.

As the corpse went past the flies left the restaurant table in a cloud and rushed after it, but they came back a few minutes later.

Marvelous.