You could not see a cloud, because No cloud was in the sky: No birds were flying overhead - There were no birds to fly.
Lewis CarrollAlice had begun with 'Let's pretend we're kings and queens;' and her sister, who liked being exact, had argued that they couldn't, because there were only two of them, and Alice hand been reduced at last to say, 'Well, you can be one of them then, and I'll be the rest.
Lewis Carroll