Father Murphy may have molested as many as 200 boys while he worked at the school from 1950 to 1974, according to the accounts of victims and a social worker hired by the Archdiocese of Milwaukee to interview him.

Mr. Geier said he first tried to tell the priest at his home parish in Madison, where he served as an altar boy, in 1966 when he was just 16. But the priest, he said, told him he did not want to hear about it, and to just forget about it. He told another priest while he was still a teenager, and yet a third priest years later, after he married.

That priest, the Rev. Tom Schroeder, 72, who led Masses for the deaf in Madison from 1970 to 1992, said in an interview Friday that he remembered Mr. Geier’s telling him about Father Murphy. Father Schroeder said that he told a nun, who told another nun who was a dormitory supervisor at St. John’s, but that the supervisor did not believe it and nothing ever came of it.

“I assumed that if enough people told her, she would finally believe it,” Father Schroeder said.

Internal church correspondence unearthed in a lawsuit against the Archdiocese of Milwaukee and given to The New York Times, which made it public it this week, included a letter from the Rev. David Walsh, who served as a chaplain for the deaf in Chicago, saying that teenage students at St. John’s had told him in the late 1950s about Father Murphy’s abuse.

Father Walsh said he told Archbishop Albert Gregory Meyer of Milwaukee, who sent Father Murphy on a retreat and then put him back in the school to undo “the harm he had done.”

In the 1970s, a group of former students who were in a vocational rehabilitation program in Milwaukee began telling their hearing supervisors about Father Murphy, a sequence of events reported in two articles in The Milwaukee Journal Sentinel in 2006.

Image Mr. Geier reported the abuse to three priests, including the Rev. Tom Schroeder Credit... Andy Manis for The New York Times

Among the supervisors was John Conway, now the deputy administrator of workers’ compensation for the State of Wisconsin. Mr. Conway, the students and others collected affidavits from 15 to 20 former students about Father Murphy’s violations. They were granted a meeting with Archbishop William E. Cousins.