It had cost Leicester some years and much labor to climb to the summit of his greatness; his descent was rapid beyond the calculation of the most sanguine among his enemies. He had hitherto enjoyed the coöperation of the powerful earls of Derby and Gloucester; but, if he was too ambitious to admit of an equal, they were too proud to bow to a fellow-subject. Frequent altercations betrayed their secret jealousies; and the sudden arrest and imprisonment of Derby, on a charge of corresponding with the royalists, warned Gloucester of his own danger. He would have shared the captivity of his friends had he assisted at the great tournament at Northampton; but by his absence he disconcerted the plans of his enemy, and, recalling Mortimer and the exiles, unfurled the royal standard in the midst of his tenantry. Leicester immediately hastened to Hereford with the King, the Prince, and a numerous body of knights. To prevent the effusion of blood their common friends intervened; a reconciliation was effected, and four umpires undertook the task of reconciling their differences. But under this appearance of friendship all was hollow and insincere. Leicester sought to circumvent his adversary; Gloucester waited the result of a plan for the liberation of Edward, which had been concerted through the means of Thomas de Clare, brother to the Earl, and companion to the Prince. One day after dinner Edward obtained permission to take the air without the walls of Hereford, attended by his keepers. They rode to Widmarsh. A proposal was made to try the speed of their horses; several matches were made and run; and the afternoon was passed in a succession of amusements. A little before sunset there appeared on Tulington hill a person riding on a gray charger and waving his bonnet. The Prince, who knew the signal, bidding adieu to the company, instantly galloped off with his friend, another knight, and four esquires. The keepers followed; but in a short time Mortimer, with a band of armed men, issued from a wood, received Edward with acclamations of joy, and conducted him to his castle of Wigmore. The next day the Prince met the Earl of Gloucester at Ludlow. They mutually pledged themselves to forget all former injuries, and to unite their efforts for the liberation of the King, on condition that he should govern according to the laws, and should exclude foreigners from his councils.