However, in 1920 there came a series of riots, which prompted a temporary warden until a more forceful one could be found. It was decided that the existing warden wasn't capable of maintaining order among the inmates which led to the rule of army colonel, Claude B. Sweezey. Sweezey establish the Sweezey Club, which rewarded good inmates for their behavior. However, his control was jeopardized following the attempted escape of 6 inmates. This prompted media interest, which criticized the Sweezey Club. Once the inmates recognized the negative impact this had on them, even the attempted escapees testified in favor of the club. Additional facilities were constructed with a stone castle-like structure as another "penal farm" for men in Hagerstown in the early 1930s, which became the Maryland Correctional Institution. Throughout the 20th century, there were more attempted escapes, one of the most famous being by that of Joseph Holmes in 1951. He dug out from underneath his cell, under the wall and out to freedom. This prompted, again, a change of warden. The newly appointed warden, Vernon L. Pepersack, tried pleasing the prisoners more to maintain order. His methods included the establishment of a library system, borrowing books from libraries outside the prison. He also arranged entertainment for the inmates, notably wrestling. This resulted in a stable period throughout the 1950s. Until the 1960s the prison had been separated by race. Because of the Civil Rights Movement, the inmates became more racially integrated. More varied entertainment was provided, for example, the black comedian, Dick Gregory. However, the 1960s also brought other changes into the prison. There was a series of riots in the late 1960s, one of the most notable being that of July 8, 1966. It occurred when inmate John E. Jones fought the correctional officers escorting him back to his cell. Overnight, rumors spread that Jones had been beaten by the officers. The next morning, six men in the mess hall started a rampage that spread outside to approximately a thousand men. Four buildings were set on fire, including the commissary, which the inmates looted and then burnt. However, around 3 hours later, there appeared to be a psychological turning point and the men started to return to their cells. Following this there were more riots on a smaller scale accompanied by many warden changes. One of the final large riots was in July 1972. Inmate Lascell Gallop was working in the kitchen and threw an acid solution in an officer's face.