Here below you can find the eleven chapters of the draft De Ecclesia elaborated by the preparatory Theological Commission for Vatican II. I apologize that they are not a single file, but I haven’t figured out how to combine several pdf documents to make a single one. The “2013” in the file name is there only to remind me of when I made the last revisions to my translation. But now Alan Aversa has kindly sent me all eleven chapters as a single file, and I will put that first, followed by the single chapters in case someone wants to use only one of them.
The Latin text of this schema can be found in two places: in the volume distributed to the Council Fathers during the first session: Schemata Constitutionum et Decretorum de quibus disceptabitur in Concilii sessionibus. Series secunda: De Ecclesia et de B. Maria Virgine (Typis Polyglottis Vaticanis, 1962) 7-90; and in the official acta of the first session: Acta Synodalia Sacrosancti Concilii Oecumenici Vaticani II, Vol. I, Pars IV (Typis Polyglottis Vaticanis, 1971), 12-122.
The official acta are still for sale, I believe, but not the original volume distributed sub secreto at the Council.
If you make use of these translations, please acknowledge the source.