This is from Fr Apostoli’s work “Fatima For Today”. It was published in 2010 so the work refers to Pope Benedict as the current pope. Cardinal Raymond Burke wrote a forward for the book:
Sister Lucia wrote about the Third Secret on January 3, 1944. She was ordered to do this by the Bishop of Leiria, and she received the permission of our Lady to do so. She did not write the Third Secret in one of her memoirs, as she did the first two secrets; rather she wrote it as a separate, single manuscript, which she then placed into an envelope. This sealed envelope was initially kept in the custody of Bishop da Silva of Leiria. To ensure better protection of the Third Secret, shortly before his death, the Bishop transferred the envelope to the secret archives of the Holy Office in Rome on April 4, 1957, and he informed Sister Lucia that this transfer had taken place.
The Popes and the Third Secret
Pope John XXIII
When Sister Lucia placed the manuscript containing the Third Secret into an envelope, she wrote on the outside of the envelope that it could be opened in 1960, either by the patriarch of Lisbon or the bishop of Leiria. She had asked Bishop da Silva to read the manuscript, but when he had refused to do so, she made him promise that it would “be opened and read to the world either at her death or in 1960, whichever came first”. When Archbishop Bertone, then secretary of the Congregation for the Doctrine of the Faith, interviewed Sister Lucia in 2000, he asked whether Our Lady of Fatima had fixed the date of 1960. “It was not our Lady,” Sister Lucia replied. “I fixed the date because I had the intuition that before 1960 it would not be understood, but that only later would it be understood. Now it can be better understood. I wrote down what I saw; however, it was not for me to interpret it, but for the pope.”9
According to Vatican records, Father Pierre Paul Philippe, OP, the commissary of the Holy Office, brought the envelope containing the Third Secret of Fatima to Pope John XXIII on August 17, 1959. In his personal diary for that date, the Pope wrote that he “brought me the letter containing the third part of the secrets of Fatima. I intend to read it with my confessor.” Later, after the Pope had read the Third Secret, he wrote: “We shall wait. I shall pray. I shall let you know what I decide.”10 Pope John XXIII finally decided not to reveal the Third Secret and to return the sealed envelope to the Holy Office. Apparently, he discerned it was not the right time, and his decision to keep the Third Secret hidden from the world had a major impact on the faithful.
Because Sister Lucia had chosen the year 1960 as the time to reveal the Third Secret, a great deal of expectation, curiosity and even dread about what the message might contain heightened significantly over the years, especially as 1960 drew near. … Many people expected Pope John XXIII to open the sealed envelope at one minute after midnight on January 1, 1960, and reveal its contents.
continued….