Q hurries along to the pub. He's carrying three books under his arm and trying to whistle. He's nervous, so he's not having much luck with it. He goes inside and sees Sirius. Gulping, he approaches.
"Hello Sirius," he greets the other man rather breathlessly. "Thank you for coming." He sets the books down so Sirius can't see the spines or covers. He's borrowed them from Professor McGonagall's library. "Er, I hope you haven't been waiting long?" He pulls out a chair and sits down.