Learning of the impending marriage, Teresa confronts Lisa, who says that she has never been found alone in a man's room. Teresa produces the handkerchief Lisa had dropped. The Count is unwilling to say what he thinks of this, but continues to insist on Amina's virtue. Elvino demands proof and Rodolfo, seeing the sleeping Amina walking across the high, dangerously unstable mill bridge, warns that to wake her would be fatal. All watch as she relives her betrothal and her grief at Elvino's rejection, taking the withered flowers in her hand. (Aria: Amina / "I had not thought I would see you, dear flowers, perished so soon".) Then as she reaches the other side safely, the distraught Elvino calls to her and she is taken into his arms. Rodolfo hands him the ring which he places on her finger, at which time she awakens and is amazed by what has happened. All rejoice. In an aria finale, Amina expresses her joy: / "Human thought cannot conceive of the happiness that fills me".