The former spokesman of the Dale Farm Travellers has been jailed for his part in raids on museums stealing priceless artefacts.
47-year-old Richard Sheridan got five and a half years.
Two other men from Essex were jailed on Monday.
In all, 13 have been jailed.
Judge Murray Creed heard that although the items stolen in Durham and Cambridge were valued at up to £18 million, detectives believe they might have fetched more than three times that figure on the booming Chinese auction market.