Wherever the blacks poured across a street to take up new habitations that would accommodate the constant influx from the South and widening opportunities for those already in the North, seeking to escape from their hideous encirclement under unspeakable conditions, they were fought and often killed by hooligans from such old mobs as the Hancocks, the Irish Dukes, the Rainbows and the Goat Hill Hoodlums, who originated in the days of Irish squatter possession of Lexington Avenue and west, north of 96th Street. The Negroes defended themselves the best they could, and under the guidance of grownup "captains and war counsellors," as they are still known, they organized what now constitutes about 75 gangs in upper Manhattan. They run from 25 to 40 and some to 200. Among the principal Negro gangs are the Sabres, the Socialists, the Chancellors, the Buccaneers, the Copians, the Barons and the Slicksters. Their activities now range from fighting each other for the pure love of bloodshed (called "rumbles") to highway robbery. Often fights are faked so that in the confusion and the crowd a quick job of larceny is inconspicuous. The Chancellors, a strict organization with rank and titles, according to age, strength, bravado and accomplishments, is typical. The groups run progressively up from Tiny Tims to Midgets to Juniors to Seniors. Each class takes orders from the one above and all are as strictly ruled and disciplined as were the Czar's Cossacks, by their war counsellors, known as "bigs." Not the least of their power is in their auxiliaries, girls ranging from 12 years up, who start as Sub-debs and graduate to become Debs. They are usually the mistresses of the Seniors. Their roles are important before, during and after acts of violence. By police regulations, only females may search females. The Debs and Sub-debs are usually from 50 to 500 feet behind the warriors. They carry the weapons. Should there be a sudden police charge, the girls evaporate in all directions and the men are found unarmed. But the moment the first fist flies, they rush in and slip the took to the Chancellors. Very often they join in the fight with them and punch, bite and stab, and are quite as vicious as the males. The weapons, featuring the switch-blade spring knife which is the Harlem standby, also run to first-rate shooting arms and homemade guns which are converted from lengths of tubing. Billies, sword-canes and ice-picks are standard equipment. The harmless-looking souvenir toy bats sold at the ball parks, which can crack a skull at a single swipe, are regularly employed.