was ambitious and capable, Henry (surrounded with corrupt advisers) was trusting, pliable, and increasingly unstable, and Margaret was defiantly unpopular, grimly and gallantly determined to maintain the English crown for her progeny. Yet at least one scholar identifies the source of the eventual Lancastrian downfall not as York's ambitions nearly so much as Margaret's ill-judged enmity toward York and her over-indulgence in unpopular allies. Nevertheless, Queen Margaret was a powerful force in the world of politics. King Henry was putty in her hands when she wanted something done. Margaret's biographer Helen Maurer, however, disagrees with earlier historians having dated the much-vaunted enmity between the Queen and York to the time he obtained the office of the protectorship. She suggests the mutual antagonism came about two years later in 1455 in the wake of the First Battle of St Albans, when Margaret perceived him as a challenge to the king's authority. Maurer bases this conclusion on a judicious study of Margaret's pattern of presenting gifts; this revealed that Margaret took a great deal of care to demonstrate that she favoured both York and Edmund Beaufort, 2nd Duke of Somerset, equally in the early 1450s. Maurer also claims that Margaret appeared to accept York's protectorship and asserts there is no substantial evidence to back up the long-standing belief that she was responsible for the Yorkists' exclusion from the Great Council following Henry's recovery (see below). The late historian Paul Murray Kendall, on the other hand, maintained that Margaret's allies Edmund Beaufort and William de la Pole, then Earl of Suffolk, had no difficulty in persuading her that York, until then one of Henry VI's most trusted advisers, was responsible for her unpopularity and already too powerful to be trusted. Margaret not only persuaded Henry to recall York from his post as governor in France and banish him instead to Ireland, she repeatedly attempted to have him assassinated during his travels to and from Ireland, once in 1449 and again in 1450. Edmund Beaufort and Suffolk's joint responsibility for the secret surrender of Maine in 1448, and then the subsequent disastrous loss of the rest of Normandy in 1449 embroiled Margaret and Henry's court in riots, uprisings by the magnates, and calls for the impeachment and execution of Margaret's two strongest allies. It also might have made an ultimate battle to the death between Margaret and the House of York inevitable by making