The first English language Mass was of Gregorian chant style. It was created by De Paul University graduate Dennis Fitzpatrick and entitled simply "Demonstration English Mass". Fitzpatrick composed and recorded this mass on vinyl in mid-1963. He distributed it to many of the US bishops who were returning from a break in the Second Vatican Council. The Mass was well received by many US Catholic cleric and is said to have furthered their acceptance of "Sacrosanctum Concilium" (SC). This Vatican document on the sacred liturgy restructured the Mass and permitted the use of vernacular. Fitzpatrick's Mass had allowed the bishops to imagine what an English Catholic liturgy might sound like. Along with the music that Fitzpatrick wrote, he also penned the "Demonstration English Liturgy Altar Missal".