Pope Pius XII references the letter of Pope-elect Stephen (II) to St. Boniface. Pope Stephen II while elected, died before his papal consecration and generally is excluded from the numeration of 260 pontiffs through 1958, but sometimes the numeration of Stephens labels him as Pope Stephen II and thus numbers Pope Stephen II as Pope Stephen III, etc. Pope Pius XII, ECCLESIAE FASTOS, June 5, 1954: Pope Stephen II, to which Pontiff shortly after his election, when already coming to the end of his life's span, he wrote a letter full of reverence [to St. Boniface, his contemporary]. (Par. 12)