Rubuta ci gaba don wannan sakin layi - A ranar 27 ga Nuwamba, 1911, O'Connell ya zama Babban Bishop na farko na Boston don zama Cardinal, kuma an ba shi taken Cardinal-Priest na S. Clemente. Ya makara a taro biyu da aka yi a shekara ta 1914
da kuma 1922, saboda dole ne su haye Tekun Atlantika a cikin jinkirin sufuri na rana. Ya yi gunaguni ga Paparoma Pius XI, wanda ya ba da amsa ya tsawaita lokacin da ke tsakanin mutuwar Paparoma da farkon taron. O'Connell a ƙarshe ya sami damar shiga cikin taron 1939 na gaba, kodayake a wannan lokacin akwai zirga-zirgar jiragen sama.