VATICAN CITY (AP) — The mystery of the 1983 disappearance of the 15-year-old daughter of a Vatican employee took yet another twist Saturday following excavations this week at a Vatican City cemetery. The Vatican said it had discovered two sets of bones under a stone slab that will be formally opened next week. The new discovery came after Vatican on Thursday pried open the tombs of two 19th-century German princesses in the cemetery of the Pontifical Teutonic College in hopes of finding the remains of Emanuela Orlandi. Orlandi’s family had received a tip that she might be buried there. But the tombs turned out to be empty, creating yet another mystery about where the dead princesses were. The Vatican vowed to keep investigating and noted that any bones in the tombs might have been displaced during structural work carried out on both the college building and a cemetery near St. Peter’s Basilica in the 1800s and in more recent decades. On Saturday, Vatican spokesman Alessandro Gisotti said further searches had centered on the areas adjoining the princesses’ tombs. He said investigators had located two ossuaries, or sets of bones, under a stone slab manhole covering inside the Teuto...