Lines of different stone mark later building.

不同石材层标识出晚期建筑。

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He believes that as far back as 30,000 B.C., hunters may have used a system of notation, engraved on bone and stone, to mark phases of the Moon.

他认为，远在公元前30,000年以前，猎人可能会用一套刻在骨头和石头上的符号系统来标记月相。

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Blue flags define the excavation perimeter, while yellow ones mark the location of fossils or stone tools.

蓝旗用来显示发掘地的周长，而黄旗用来标明发掘出化石或石制工具的地点。

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Lily - not her real name - was in a two-year relationship with "Mark Stone" until 2005.

BBC: Undercover police 'betrayed' women in relationships

But three women suing the Met say they had a long-term intimate relationship with him, as he posed as protester "Mark Stone".

BBC: Undercover police 'betrayed' women in relationships

That would go some way to solving the mystery of whether the stone was erected to mark the graves, or whether the pots were put in place afterwards.

BBC: Human remains found in Bronze Age pots