LONDON (AP).- And then there were some — lots, in fact. The British Museum announced Monday it has acquired 6,000 ancient carved ivories that were excavated in Iraq with the help of mystery maven Agatha Christie. The pieces were found at the site of the Assyrian capital of Nimrud between 1949 and 1963 during an expedition led by British archaeologist Max Mallowan. His wife, Christie, was part of the team and helped clean and preserve the objects when not working on thrillers including “They Came to Baghdad.” The pieces, which are almost 3,000 years old, once decorated furniture, horse trappings, chariots and containers and would have been adorned with gold and precious stones. Originally imported as booty from cities along Mediterranean, they were discovered in a royal arsenal within a palace at Nimrud, just south of the modern city of Mosul in northern Iraq. Nimrud was the capital of the