The article quotes accounts from Hiroshima, first shared in John Hersey's book, Hiroshima, from a Jesuit priest missionary, then 37 years old: Fr. Pedro Arrupe, S.J.,was later the 28th Superior General of the Society of Jesus.
Footnote: Georgetown University, the Jesuits' flagship university, educated me, in the School of Foreign Service. What I learned there helped inform my worldview when I moved to East Tennessee as Appalachian Observer editor, exposing corruption and winning U.S. Department of Energy declassification forty (40) years ago of the world's largest mercury pollution event, perpetrated by Union Carbide and the U.S. Government at the Y-12 Nuclear Weapons Plant..
From AMERICA, the Jesuit Magazine: