Thra (ΘΡΑ) Well (East of Stoa Room 2). Heavy dumped filling, including figured, black and plain wares, and also a quantity of animal bones, mostly skulls of oxen. On many of these the horns had been sawn ... Ca. 520-480 B.C ... Thra (ΘΡΑ) Well (East of Stoa Room 2). Heavy dumped filling, including figured, black and plain wares, and also a quantity of animal bones, mostly skulls of oxen. On many of these the horns had been sawn off sharply near the base; the freshness of the sawn surface suggested that this had been done at the time of slaughtering rather than while the animal was still alive.