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and features described as claws or hands, giving an asymmetric appearance, the entire formation measuring 119 metres (130 yards). Thousands of visitors flocked to see the pictogram and Carson is said to have made about £5, 000 in admission charges. The image of this pictogram was given further life when the rock group Led Zeppelin used it as cover art for a box set of CDs. Two very similar pictograms followed, one apparently pointing at Silbury Hill, measuring 137 metres (150 yards). Further giant pictograms followed in Hampshire, with a particularly beautiful formation at Hazely Farm, near Cheesefoot Head, which appeared to combine features of both the earlier Hampshire pictograms and the later Wiltshire ones. Outside these two counties, circles were reported from Devon, Sussex, Norfolk, Cambridge, Northants and Lancashire. Circles were also reported in Scotland. Further attempts to capture a circle forming were made in 1990, with two watches mounted, one in Wiltshire led by Earl Haddington, the other a high-tech affair under Andrews and Delgado's direction Operation Blackbird had been planned with John Macnish, the television producer who had recorded the 'Noise' the previous year and involved collaboration with a Japanese television production company. A site was identified at Bratton Castle, on the edge of Salisbury plain, and once again cameras were trained on a field thought to be a probable location of circles. The project was the subject of coverage by the BBC's Daytime Live programme and, on 25 July, Andrews made a New Surveillance Attempts in Hampshire. sensational announcement to the viewers.