Ceinwen arched an eyebrow at the young lady. A trapdoor underneath the picture of the Museum? Ridiculous. That would be entirely too obvious, and she would have seen it by now. Or would have if she had condescended to wear her glasses. Er, wait, no, she didn't wear glasses. She drank out of them. Completely irrelevant. Bewildered, she looked around again and tried to figure out where she was. The nice young lady had lost her hand to a large picture of what certainly looked like the British Museum, but that was down the road, so... it must be magic? "Ooo! Are you a witch then too?" she asked excitedly. "Splendid! I always wanted to meet another witch. But, shhh!" she lowered her voice to a pig's whisper. "Not out here. The Muggles might hear us. Especially that one," she pointed her thumb over her shoulder at the mo'ai statue, before scuttling through the photograph.
"Well, now," she said, impressed at what she saw and seemingly (for the moment) back to herself again. This room was much larger than the front gallery for the Muggles, and the paintings, photographs, and sculptures were clearly magical. Though not all of them were moving very much, there was the automatic sensation of life that the dull, photocopied Muggle reproductions could not truly duplicate. Ceinwen received a welcome wave, and waved back, at a particularly striking statue of a centauress that looked quite a lot like Sepherene, one of the herd in the Forbidden Forest back when she had been a student at Hogwarts. The statue's ridiculously long wavy hair artfully covered her breasts and cascaded down her back just as Sepherene's did, though perhaps that was a common state to all female centaurs. Ceinwen wouldn't know, as she had only met the one.
"I'm quite sure now that anything I purchase from you, I will like," she complimented Louise as she made her way along the right-hand wall, different paintings scattered between the small windows that looked out on a tiny courtyard - presumably one Muggles could not see either. "If this is all your work, you are a singularly talented young woman, Louise." A diminutive man and woman meant to look like the Muggle idea of fairies, skyclad and dragonfly-winged, blushed at the compliment intended for their painter as they sat caressing each other under the fern leaf that was protecting them from the rain.
"You've been at this a long time, I take it?" Ceinwen turned around and looked at the woman with a broad smile on her face. "It's a wonderful thing to see a person with such great talent not allowing it to be squashed or suppressed." She rearranged her face to be more business-like and went on, "Now then. What might you recommend for decorations? It's going to be a twilight party, out-of-doors, in a field just off A470 in Rhayader, right on the banks of the River Wye. We have about fifteen thousand square metres of space to work with and some of the best casters of Muggle-Repelling and Concealment Charms, and I know they're going to have paper lanterns and a lot of white and silver streamers."