By Stephen M. Silverman
Updated June 10, 2002 01:00 PM

The marital mystery tour has been solved. Former Beatle Sir Paul McCartney and his fiancee, former model Heather Mills, whose marriage plans have been the subject of wide speculation in the press on both sides of the Atlantic, are at the 17th-century Castle Leslie in Glaslough, Ireland, having landed there by helicopter during the weekend. They plan to marry there on Tuesday, it was confirmed to Reuters on Sunday. “They are at the castle. It is true they are going to get married there on Tuesday,” McCartney’s spokesman, Geoff Baker, told the news service. McCartney, 59, and Mills, 34, are to be married by a local priest in St. Salvator’s Church, a modest stone chapel located on the grounds of the castle’s 1,000-acre estate, says Reuters. Some 300 guests are expected, including fellow ex-Beatle Ringo Starr and guitarist Eric Clapton, and press reports say that each invitee was asked not to bring a camera or mobile phone, to preserve the privacy of the event. According to Reuters, thousands of flowers were delivered to Castle Leslie during the weekend, and canopies were erected on the walkway between the main residence and the chapel — to guard against both rain and prying paparazzi in helicopters. The marriage will be the second for the bride and the groom. Mills was divorced after a brief marriage in 1989. McCartney was widowed in 1998, when his wife, Linda Eastman, died of breast cancer.