The Irishman is the true cosmopolitan immigrant. All-pervading, he shares his lodging with perfect impartiality with the Italian, the Greek, and the "Dutchman," yielding only to sheer force of numbers, and objects equally to them all. A map of the city, colored to designate nationalities, would show more stripes than on the skin of a zebra, and more colors than any rainbow. The city on such a map would fall into two great halves, green for the Irish prevailing in the West Side tenement districts, and blue for the Germans on the East Side. But intermingled with these ground colors would be an odd variety of tints that would give the whole the appearance of an extraordinary crazy-quilt. From down in the Sixth Ward, upon the site of the old Collect Pond that in the days of the fathers drained the hills which are no more, the red of the Italian would be seen forcing its way northward along the line of Mulberry Street to the quarter of the French purple on Bleecker Street and South Fifth Avenue, to lose itself and reappear, after a lapse of miles, in the "Little Italy" of Harlem, east of Second Avenue. Dashes of red, sharply defined, would be seen strung through the Annexed District, northward to the city line. On the West Side the red would be seen overrunning the old Africa of Thompson Street, pushing the black of the negro rapidly uptown, against querulous but unavailing protests, occupying his home, his church, his trade and all, with merciless impartiality. There is a church in Mulberry Street that has stood for two generations as a sort of milestone of these migrations. Built originally for the worship of staid New Yorkers of the "old stock," it was engulfed by the colored tide, when the draft-riots drove the negroes out of reach of Cherry Street and the Five Points. Within the past decade the advance wave of the Italian onset reached it, and to-day the arms of United Italy adorn its front. The negroes have made a stand at several points along Seventh and Eighth Avenues; but their main body, still pursued by the Italian foe, is on the march yet, and the black mark will be found overshadowing to-day many blocks on the East Side, with One Hundredth Street as the centre, where colonies of them have settled recently.