I wondered at first why so many people had fled to the country, why so many signs "For Sale" or "For Rent" were to be seen about Spruce and Pine and Walnut Streets. Various reasons were given me:—with the Law Courts now in the centre of the town and the new Stock Exchange at Broad and Walnut, and stores everywhere, nobody could live in town; the noise of the trolleys is unbearable; the dirt of the city is unhealthy; soft coal has made Philadelphia grimier than London; the motor has destroyed distance;—excellent reasons, all of them. But it was not until I discovered the Russian Jew that I understood the most important. It is the Russian Jew who, with an army of aliens at his back—thousands upon thousands of Italians, Slavs, Lithuanians, a fresh emigration of negroes from the South, and statistics alone can say how many other varieties—is pushing and pushing Philadelphians out of the town—first up Spruce Street, nearer and nearer to the Schuylkill, then across the Schuylkill into the suburbs, eventually to be swept from the suburbs into the country, until who can say where there will be any room for them at all? With the Russian Jew's genius for adapting himself to American institutions, I could fancy him taking possession of, and adding indefinitely to, the little two-story houses that already stretch in well-nigh endless rows to the West and the North, Germantown and West Philadelphia built over beyond recognition. I remember when, one day in a trolley, I had gone for miles and miles between these rows-