Diarmuid Martin, the Catholic Archbishop of Dublin, was aware of gay sex rumours circulating about the national seminary at St Patrick’s College in Maynooth when he received a signed letter from a woman last May. She said she was writing on behalf of an unnamed seminarian who feared a backlash if he went public. She urged the prelate to take action to stop student priests’ promiscuous homosexuality, including use of the gay dating app, Grindr.

Martin replied that, if what the woman was alleging was true, somebody must come forward with information. He offered to provide her and the seminarian…