 John Lynch (I) (qv) (OBrien) cut his lip badly in the drinking  scene, after the plotting to recover the three bodies from across  the border (with Father Rudden etc), about 47 minutes into the film.  Just after he says "I cant drink anymore," and as he says this  someone places a glass in front of him, he lent forward, thus  catching his face on the glass. The scene was stopped after that.