Trevor can see a few low-lying tree branches and shrubs swaying from the recent pass of something - evidently this is the way Langan went. Diggory soon appears with his pistol, and Dr. Hewitt with a small knife, and together the three begin the descent to outside.
Looking the direction Trevor indicates, the men follow a trail of swaying branches and crushed grass towards a small clearing. On the opposite side of the clearing, the waters of the Grwyne Fechan can be seen. The three stop in the trees, just outside of the clearing. Several moving forms can be seen - you recognize these as the shapes of several of the small, pygmy-like people encountered earlier.
Two human shapes are also to be seen - a young man, clearly Langan, and a woman, apparently about the same age, with a distinctly non-English cast to her features. Langan reaches into his coat-pocket and removes something that can't quite be made out. He extends it towards the woman.
"Mistress," he says. "I have brought it." He opens his hand to reveal a large ruby.
The woman, who appears to be an Arab or Indian, takes the gem from Langan with a hand that appears somehow too large. "The Jewel," she says, holding the ruby up to the early light. As she raises it, you can see that it is carved to resemble a scarab, and has several darker spots on it. The woman nods. "The Jewel of Seven Stars. Doctor!"
Another man appears - seemingly out of nowhere. An old man, he remains stocky and well-built despite his apparently advanced age. He is bald as an egg and his eyes appear oddly too large for his face. The woman shows him the ruby and he claps Langan on the back. "Excellent job, my boy, excellent job at getting this from the Museum." He turns towards the woman. "Now we can proceed, and should do so before we are hindered any further. I came only to confirm that he did, indeed, have it. My curiosity satisfied, I must return to the caravan. There are matters in London that require attending to. I would advise, Tera, that you and Langan do the same." With that, the man walks behind a tree and vanishes.
The Arabic woman puts her hand on Langan's shoulder and whispers something to him that you cannot make out. Langan nods, and the two begin walking towards where the 'doctor' vanished.
Make an Intelligence check.