Analysis of information sources in references of the Wikipedia article "In pectore" in English language version.
If the holy father had made that person's name known before dying, it would have been disclosed by now," said Cardinal Edmund Casimir Szoka of Michigan. "It's over. That person will no longer be a cardinal.
Prospero Colonna and Giuliano Cesarini were made cardinals in pectore on 24 March 1426.
After the Roman Pontiff has made his name public...
These secret creations are different than those created and reserved in pectore. The latter ones [by Paul III] are known only to the pope while the former creations [by Martin V] are also known to the other cardinals.[self-published source]
These secret creations are different than those created and reserved in pectore. The latter ones [by Paul III] are known only to the pope while the former creations [by Martin V] are also known to the other cardinals.[self-published source]