Edward now gave full proof of his natural generosity and clemency. A treaty was signed in which Llewellyn consented to pay the king a tribute of one thousand marks a year for the Isle of Anglesea; to pay fifty thousand pounds for the cost of the war; and to give ten hostages for the fulfilment of these engagements. The very next day, Edward, who had made peace the moment the Welsh Prince desired it, remitted the fine of fifty thousand pounds and soon after gave up the tribute for Anglesea and restored the hostages. He then invited Llewellyn to spend Christmas at Westminster; and in the following summer prepared a princely wedding at Worcester for him and Eleanor de Montfort.

For four years the Welsh troubles seemed at an end. All was apparently peace and content. But "a prophecy of Merlin had announced that when English money became round, the Prince of Wales should be crowned at London, and a new coinage of copper money, coupled with the prohibition to break the silver penny into halves and quarters, as had been usual, was supposed to have fulfilled the prediction."[17] Upon such slight matters do the fate of nations hang. The hopes of the misguided Welsh were again excited; and in 1282, Llewellyn's brother David—who had been heaped with favors by Edward, given an English earldom, and married to the Earl of Derby's daughter—suddenly broke into open rebellion. On Palm Sunday he surprised the garrison of Hawarden Castle—now well known as the residence of Mr. Gladstone, the English Premier. He hurried Lord Roger de Clifford the governor, wounded and in chains, over the mountains, while he himself and Llewellyn, who never before agreed, were now reconciled, and together overran the marches with fire and sword.

Even now Edward strove to come to terms before taking up arms. He allowed the archbishop to go to Llewellyn as a mediator. It was of no use. So in the summer of 1283 he collected his forces and once more entered Wales.

In the campaign which followed, the sufferings of the English were terrible. Llewellyn held out in Snowdon with the determination of despair. An English detachment was cut to pieces at the Menai Straits; and the war was prolonged into the winter. The undaunted king, however, rejected all proposals of retreat; and gave orders for the formation of a new army at Caermarthen to complete the circle of investment. This proved needless. Llewellyn, fearing probably to be shut up and starved out in his fastness, left Snowdon and passed into Radnorshire. Here he fell in with a party of English under the command of Edward Mortimer and John Gifford; and in a skirmish at Builth on the banks of the Wye he was killed by Adam Frankton, an English soldier, who did not even know who he was. But the body of the dead man, lying in the little hollow among the broom beside the spring, was recognized by some of the leaders. His head was cut off and sent to the king. Then, crowned with ivy, it was set up over the gate of the tower of London. Thus was Merlin's prophecy fulfilled. The "Prince of Wales" was indeed crowned at London.

David of Snowdon held out in the wilds of the mountains for a few months, and at last was arrested and sentenced to a traitor's death.

With Llewellyn's death Wales became and has remained ever since, part of the kingdom of England. English laws were established, and the barbarous Welsh laws abolished. The country was divided into shires and hundreds on the English model. Strong castles were built at Conway and Caernarvon; and at the latter in 1284, Queen Eleanor gave birth to "the Prince of Wales, who could not speak a word of English," as his father said when he presented the future Edward the Second to the Welsh chieftains. A tradition has existed that Edward completed the pacification of Wales by a massacre of the Bards. In spite of that very familiar quotation from Gray's Ode,

Ruin seize thee, ruthless king!

one is thankful to know that modern historians have proved this terrible accusation to be a mere fable; besides it is a fact that from the time of Edward to that of Elizabeth, the productions of the bards were so numerous as to fill more than sixty volumes in quarto.

Meantime the Abbey had been yearly growing in beauty. Edward the First added to his father's building. On his return from the crusades he brought from France the slabs of porphyry, the precious marbles, which still help to make his father's tomb one of the most gorgeous monuments in the Abbey. He filled the Confessor's Chapel with trophies of his wars—the dagger with which he was wounded at Acre—the Black Rood of St. Margaret and the Stone of Fate from Scotland. But these were all given in later years. What we have to do with were certain trophies of the Conquest of Wales.

While the king was still engaged in quieting down his new principality, his eldest son Prince Alfonzo, named after his grandfather Alfonzo of Castile, came journeying back to London. He brought with him Llewellyn's golden crown, said by tradition to have belonged to King Arthur, also jewels and ornaments, and possibly the precious Crocis Gneyth (or Cross of St. Neot) which certainly was brought to the Abbey from Wales during Edward the First's reign.