The Prince of Wales, it is known, brought away from this visit an impression that the establishment of a prince of the blood in Ireland, or a series of royal visits to Ireland, would go far towards pacifying the relations between the two Islands. Mr. Gladstone thought his Disestablishment would quite do the work. Events have shown that Mr. Gladstone made a sad mistake as to the effect of his measure. The pains which, I am told, were taken by Mr. Deasy, M.P., and others to organise hostile demonstrations at one or two points in the south of Ireland, during a subsequent visit of the Prince and Princess, would seem to show that in the opinion of the Nationalists themselves, the impression of the Prince was more accurate than were the inferences of the Premier. There is nothing froward or formidable in the aspect of Dublin Castle. It has neither a portcullis nor a drawbridge. People go in and out of it as freely as through the City Hall in New York. There is a show of sentries at the main entrance, and in one of the courts this morning the picturesque band of a Scotch regiment was playing to the delectation of a small but select audience of urchins and little girls. A Dublin mob, never so little in earnest and led by a dozen really determined men, ought to be able to make as short work of it as the hordes of the Faubourgs in Paris made of the Bastille, with its handful of invalids, on that memorable 14th of July, about which so many lies have passed into history, and so much effervescent nonsense is still annually talked and printed. The greater part of the Castle as it existed when the Irish Parliaments sat there under Elizabeth, and just before the last Catholic Viceroy made Protestantism penal, and planned the transformation of Ireland into a French province, was burned in the time of James II. The Earl of Arran then reported to his father that "the king had lost nothing but six barrels of gunpowder, and the worst castle in the worst situation in Christendom." Here, as at Ottawa, a viceregal dinner-table is set off by the neat uniforms and skyblue facings of the aides-de-camp and secretaries. For some mysterious reason Lord Spencer put these officers into chocolate coats with white facings. But the new order soon gave place to the old again. At the dinner to-night was Lord Ormonde, who is returning to London, but kindly promised to make arrangements for showing me at Kilkenny Castle the muniment room of the Butlers, which contains one of the most valuable private collections of charters and State papers in the realm.