In "Mit brennender Sorge", Pope Pius XI said that the Holy See had signed the Concordat "in spite of many serious misgivings" and in the hope it might "safeguard the liberty of the church in her mission of salvation in Germany". The treaty comprised 34 articles and a supplementary protocol. Article 1 guaranteed "freedom of profession and public practice of the Catholic religion" and acknowledged the right of the church to regulate its own affairs. Within three months of the signing of the document, Cardinal Bertram, head of the German Catholic Bishops Conference, was writing in a Pastoral Letter of "grievous and gnawing anxiety" with regard to the government's actions towards Catholic organisations, charitable institutions, youth groups, press, Catholic Action, and the mistreatment of Catholics for their political beliefs. According to Paul O'Shea, Hitler had a "blatant disregard" for the Concordat, and its signing was to him merely a first step in the "gradual suppression of the Catholic Church in Germany". Anton Gill wrote that "with his usual irresistible, bullying technique, Hitler then proceeded to take a mile where he had been given an inch" and closed all Catholic institutions whose functions weren't strictly religious: