"Oh, I know, but after getting everything from a paper ball of the drawing to a rock chucked at my head, I learned right quick not to tell women how unfortunate their faces were," Jack laughed and looked over his shoulder to make sure that woman had gone. "Sometimes they tell me what they want, but if they're paying me five quid for a quickie sketch, they're not going to get a masterpiece."
Jack shifted a bit, getting comfortable in his special made chair - it was just a backward facing chair with a slanted back for him to rest his book on, but sometimes sitting in the cold made him feel a bit stiff. He tilted his neck a bit and made a few guide lines on the page. "I'm Jack, by the way. Welcome to Speaker's Corner. Have you ever been here before? Heard some of the speakers do their work?"
He glanced up at Harry, biting his lip and taking in the features. Now that he could see the bloke properly, there wasn't anyway Jack could not have recognized him, but he made no outward sign of recognition. Jack reckoned that if Harry Potter had ended up sitting at a caricaturist kiosk in Hyde Park, there was a reason and it was probably not best to go on thanking him for saving the world. Anyway, Jack could reserve this story for later and tell his brothers. "Could you shift a bit to the left, not all the way, just so you're looking a bit over my shoulder, thanks."