Historians have speculated as to the date at which Mortimer and Isabella actually became lovers. The modern view is that the affair began while both were still in England, and that after a disagreement, Isabella abandoned Mortimer to his fate in the Tower. His subsequent escape became one of medieval England's most colourful episodes. However almost certainly Isabella risked everything by chancing Mortimer's companionship and emotional support when they first met again at Paris four years later (Christmas 1325). King Charles IV's protection of Isabella at the French court from Despenser's would-be assassins played a large part in developing the relationship. In 1326, Mortimer moved as Prince Edward's guardian to Hainault, but only after a furious dispute with the queen, demanding she remain in France. Isabella retired to raise troops in her County of Ponthieu; Mortimer arranged the invasion fleet supplied by the Hainaulters and an army supplied by his supporters back in England, who had been sending him aid and advice since at least March 1326.