George gave genuinely startled laugh. Sure Remus had been a mapmaker and all, but he was also an Order member, and he'd been a Professor there for a bit, so George hadn't seriously expected any kind of positive answer there. Not that he'd complain!
"Oh. So you were trying to order them about and give them lessons. . . you were a Professor even when you weren't a Professor," George decided with a smirk. He made a dismissive and vaguely rude noise. "Charmed parchment you buy in bulk is bollocks. Barely worth the money. Fred and me thought about making better, but then we were bored thinking about it, so we didn't." Since Fred and George had a lot of ideas, and generally the ones that didn't make them giggle to think about got ignored in favor of ones that seemed like more fun right from the get go.
He listened though. It made sense a bit. Not the oldest passages, but there were quite a few that he and Fred had judged added right about the same time, and they'd wondered why. The one to the Shack they'd sussed out the reason for when they found out Lupin had a fuzzy night once a month. But the others hadn't made as much sense. "Fred and me did some charms and stuff, and we tried to recreate the map a couple of times, but never quite came out the same. I've got this idea. . . " George leaned forward a little, gesturing in a broad and pointless sort of way, empty shot glass moving with his hand. "I thought about doing it as an Order tool. If there was a way to take a blank parchment, build all the charms in, and then set it to a certain building when you got within range to do an instant map - not an in-depth one, but a basic sort. And have it tracking people inside. Be brilliant for Aurors or the like if they're trying to sneak in. But when we tried, any kind of wards up to check for spells got triggered. Plus we figured it'd be utter shite if we made them and then the other side got hold of them to use against us. So we gave it up." Also they'd been distracted by Fred trying to charm a Pygmy Puff to fly.
He settled back again, pouring another shot from a bottle that seemed to not actually be getting much lower, somehow. (Neverending Weasley Whiskey, patent pending if Ogden's got off their arse to partner up about it.) He shrugged a little. "He was a good bloke," was all George really thought to say. He didn't really want to dwell on the dead when he didn't have to, so he raised the shot instead and smiled. "Bet he could drink you under the table too."