The five-week-old son of British royal Prince Edward, the Earl Of Wessex, has been rushed to the hospital with a serious mystery illness. Edward's wife Sophie, Countess of Wessex, was seen arriving through the back entrance of London's Great Ormond Street Hospital on Thursday (24Jan08) accompanied by bodyguards. The 42-year-old is reportedly holding a vigil in a private ward while doctors conduct various tests on baby James to determine his condition. A source tells British newspaper The Daily Express, "Sophie arrived just after 3pm. You could tell by the looks on their faces that they were very concerned. "They rushed upstairs and went straight into a consultant's room." A royal spokesman declined to comment on the hospitalisation, describing it as a "private matter". James - who was born by Caesarean section on 17 December last year (07) - is officially titled Viscount Severn and is eighth in line to the throne.