Mr. Gavan DUFFY has within the last few days bade his farewell to the stage of public life as the “Last of the Young Irelanders,” being about to repair to Australia. The secession of the priests from the cause of “Tenant Right” is the principal reason given by Mr. DUFFY for his becoming “and exile of Erin.”

For several years, Mr. DUFFY exercised great influence over the popular party in Ireland. He was proprietor and Editor of the Nation, and displayed considerable literary abilities. He composed also some spirited ballads; in which he showed himself more loyal to the laws of metre than those of the land.

Lady DEFFERIN’s “Lament of the Irish Emigrant” owes much of its celebrity to Mr. DUFFY;s edition of Irish Ballads; and Lord Jeffrey, in his “Letters” gave great praise to the volume. Mr. Gavan DUFFY presented in some respects a favorable contrast to the tribe of Irish agitators. He risked his health and his fortune for his party; he suffered severely in its service; and it was only when there was no one to follow the flag that he consented to hand it down.

What fact can more strikingly testify to the social revolution in Ireland?