SAS had always operated separately from SDS, but the two organizations came together on the issue of the gymnasium. Meeting on April 22, SAS president Cicero Wilson and SDS chairman Mark Rudd endorsed the Sun Dial Rally planned for the next day.
At noon on April 23, 300 people gathered at the Sun Dial. Both Wilson and Rudd addressed the large crowd that had assembled on Low Plaza. The crowd attempted to enter Low Library to present President Kirk with a list of demands, but found the building locked and the steps in front of the building occupied by 200 anti-demonstrators. The protesters then proceeded to the gym construction site, where they tore down the area’s protective fencing; police at the scene arrested Fred Wilson (CC 1969) in a scuffle.
At Rudd’s urging, the other protestors returned to campus and then made their way into Hamilton Hall, where they were joined by anti-protesters and by students attending classes. During their occupation, protesters restrained acting Dean Henry Coleman from leaving his office. President Kirk, off campus for the afternoon, proposed calling in the police, but Provost David Truman and Dean Coleman advised against this for fear of a violent confrontation.
Meanwhile, SAS and SDS groups inside Hamilton formed two separate steering committees to consider further action. Several hundred students and three deans spent the night inside the building. Members of the College faculty called for a meeting of the faculty for the next afternoon.