garner further French support, which resulted in the Tour de Nesle affair. The journey was a pleasant one, with many festivities, although Isabella was injured when her tent burned down. During the visit her brothers Louis and Charles put on a satirical puppet show for their guests, and after this Isabella had given new embroidered purses both to her brothers and to their wives. Isabella and Edward then returned to England with new assurances of French support against the English barons. Later in the year, however, Isabella and Edward held a large dinner in London to celebrate their return and Isabella apparently noticed that the purses she had given to her sisters-in-law were now being carried by two Norman knights, Gautier and Philippe d'Aunay. Isabella concluded that the pair must have been carrying on an illicit affair, and appears to have informed her father of this during her next visit to France in 1314. The consequence of this was the Tour de Nesle Affair in Paris, which led to legal action against all three of Isabella's sisters-in-law; Blanche and Margaret of Burgundy were imprisoned for life for adultery. Joan of Burgundy was imprisoned for a year, although she was later acquitted. Isabella's reputation in France suffered somewhat as a result of her perceived role in the affair. In the north, however, the situation was becoming worse. Edward attempted to quash the Scots in a fresh campaign in 1314, resulting in the disastrous defeat at the Battle of Bannockburn. Edward was blamed by the barons for the catastrophic failure of the campaign. Thomas of Lancaster reacted to the defeats in Scotland by taking increased power in England and turning against Isabella, cutting off funds and harassing her household. To make matters worse, the "Great Famine" descended on England during 1315–17, causing widespread loss of life and financial problems. Despite Isabella giving birth to her second son, John, in 1316, Edward's position was precarious. Indeed, John Deydras, a royal pretender, appeared in Oxford, claiming to have been switched with Edward at birth, and to be the real king of England himself. Given Edward's unpopularity, the rumours spread considerably before Deydras' eventual execution, and appear to have greatly upset Isabella. Isabella responded by deepening her alliance with Lancaster's enemy Henry de Beaumont and by taking up an increased role in government herself, including attending council meetings and acquiring increased lands. Henry's sister, Isabella