Caption on attached newspaper photograph "Police march through a cloud of tear gas in Sproul Plaza. Demonstrators scattered into nearby eucalpytus groves and a barrage of rocks, tear gas began. Handwritten on back "Police march through gas." Photo shows steps in front of Sproul Hall. A cannister of tear gas is blowing in front of ten police officers wearing vests, helmets, gas masks and carrying clubs. A man is walking along the top steps and is watching.