"The Prefect of the Congregation for the Doctrine of the Faith [Cardinal Ratzinger] asked me to put my opinions and doubts on this subject in writing. I did so, and in November 1985 I sent him a 150-page typewritten study. In January 1986, he replied that he had received these documents and appreciated their philological care."
January 1, 1970
https://en.wikiquote.org/wiki/Marcel_Lefebvre