[271] _Dá Derga_.--See an interesting Essay on the Curragh of Kildare, by Mr. W.M. Hennessy, read before the R.I.A., February 26, 1866. [272] _Profit_.--The trustees of the estates forfeited in 1688 notice this especially. Trees to the value of £20,000 were cut down and destroyed on the estate of Sir Valentine Brown, near Killarney, and to the value of £27,000 on the territory of the Earl of Clancarty. Some of these trees were sold for _sixpence a piece_. CHAPTER XVI. The English Invasion--Dermod's Interview with Henry II.--Henry grants Letters-patent--Dermod obtains the assistance of Strongbow, Earl de Clare--He returns to Ireland--Arrival of English Forces under FitzStephen--Fatal Indifference of Roderic, the Irish Monarch--He is at last roused to action, but acknowledges Dermod's Authority almost without a Struggle--Strongbow's Genealogy--He obtains a Tacit Permission to invade Ireland--His Arrival in Ireland--Marriage of Strongbow and Eva--Death of Dermod Mac Murrough--Strongbow proclaims himself King of Leinster--Difficulties of his Position--Siege of Dublin--Strongbow's Retreat--He returns to England. [A.D. 1168-1171.] [Illustration: Letter 'U'] Until this period (A.D. 1168) the most friendly relations appear to have existed between England and Ireland. Saxon nobles and princes had fled for shelter, or had come for instruction to the neighbouring shores. The assistance of Irish troops had been sought and readily obtained by them. Irish merchants[273] had taken their goods to barter in English markets; but when the Norman had won the Saxon crown, and crushed the Saxon race under his iron heel, the restless spirit of the old Viking race looked out for a new quarry, and long before Dermod had betrayed his country, that country's fate was sealed.