active politics. As regent, 1326–1330 Isabella's regency lasted only four years, before the fragile political alliance that had brought her and Mortimer to power disintegrated. 1328 saw the marriage of Isabella's son, Edward III to Philippa of Hainault, as agreed before the invasion of 1326; the lavish ceremony was held in London to popular acclaim. Isabella and Mortimer had already begun a trend that continued over the next few years, in starting to accumulate huge wealth. With her lands restored to her, Isabella was already exceptionally rich, but she began to accumulate yet more. Within the first few weeks, Isabella had granted herself almost £12,000; finding that Edward's royal treasury contained £60,000, a rapid period of celebratory spending then ensued. Isabella soon awarded herself another £20,000, allegedly to pay off foreign debts. At Edward III's coronation, Isabella then extended her land holdings from a value of £4,400 each year to the huge sum of £13,333, making her one of the largest landowners in the kingdom. Isabella also refused to hand over her dower lands to Philippa after her marriage to Edward III, in contravention of usual custom. Isabella's lavish lifestyle matched her new incomes. Mortimer, in effect her first minister, after a restrained beginning, also began to accumulate lands and titles at a tremendous rate, particularly in the Marcher territories. The new regime also faced some key foreign policy dilemmas, which Isabella approached from a realist perspective. The first of these was the situation in Scotland, where Edward II's unsuccessful policies had left an unfinished, tremendously expensive war. Isabella was committed to bringing this issue to a conclusion by diplomatic means. Edward III initially opposed this policy, before eventually relenting, leading to the Treaty of Northampton. Under this treaty, Isabella's daughter Joan would marry David Bruce (heir apparent to the Scottish throne) and Edward III would renounce any claims on Scottish lands, in exchange for the promise of Scottish military aid against any enemy except the French, and £20,000 in compensation for the raids across northern England. No compensation would be given to those earls who had lost their Scottish estates, and the compensation would be taken by Isabella. Although strategically successful and, historically at least, "a successful piece of policy making", Isabella's Scottish policy was by no means popular and contributed to the general sense of discontent with the regime. Secondly, the Gascon situation, still unresolved from Edward II's