"The Nine" (the four expelled priests plus five who voluntarily left the SSPX) balked at Lefebvre's imposition of the 1962 missal which they believed included departures from the liturgical traditions of the Church (for example, adding the name of St. Joseph to the Canon of the Mass). A more basic reason was the belief amongst the Nine that the men who had reigned as pope since the death of Pope Pius XII (d. 1958) had not been legitimate popes (Canon 1325, no. 2, 1917), although Fr. Cekada later stated that "...he 'pope question' was not raised at the time, and was not at issue." They held that these Popes had officially taught and/or accepted heretical doctrines and therefore had lost or never occupied the See of Rome (Canon 188, no. 4, 1917). Like the Society of St. Pius X, they believed that there had been novel interpretations of the traditional teachings of the Church on issues such as religious liberty. One of the Nine, Fr. Dolan, admitted that while a member of the SSPX, he had concluded that the See of Peter was vacant.