"Right, I nearly forgot." James smacked his palm against his forehead. "You just look so domestic, it always slips my mind how all werewolves are evil. How I haven't been gutted and eaten by now is anyone's guess." He nudged Remus in the ribs as Sirius dragged him off.
Once they were sequestered in the out-of-the-way corner, James plopped down to sit cross-legged in the grass, heedless of the robes. He started on his second apple but his attention was on Remus, hazel eyes keen behind his glasses as he listened to the proposition.
"Well, that sounds entirely manageable," he remarked after a moment's thought. "We just have to come up with the right combination of charms to make someone show up differently if they weren't there the moment before. And maybe something, some sort of alarm charm or an indicator to go off if someone new appears? 'Mr Prongs would like to draw your attention to a new arrival' or some such. I don't imagine Harry's looking at the Map at all times, after all."