Before the group left to Tenenbaum's bathasphere. She wrapped Walter's face with gauze bandages. To reach the bathasphere they had to cross through Pauper's Drop one more time.
When they passed the house Walter and Molly had used, Walter stopped at the door while the others continued to walk passed. Memories of the past five years came flooding into Walter. The door creaked when it opened. It was just like they left it a small bed on the right side of the house and a small table in the left corner close to the door. Walter was about to shut the door when something shiny caught his eye. It was a harmonica, siting square on a piece of cloth. Walter wrapped the harmonica in the cloth and put in his overall's pocket. Walter shut the door leaving the house and Pauper's Drop behind forever, but taking his memories with him.
When they reached Tenenbaum's bathasphere it was a bitter sweet moment for Walter. He had come to Rapture in search of work and opportunity, but found pain and misery instead. Molly sat down next to Walter, holding his hand. And with the pull of a lever, they left Rapture. They bathasphere rose higher and higher leaving Rapture further and further behind. It was somber, quiet in the bathasphere; no one said a word. Walter undid his wrapping enough to uncover his mouth. He took the harmonica out of his pocket and blew into it, making a sour note. He blew again, the note sounding better. He played some notes to find the tune; then he played "Nearer My God To Thee". He had remembered the song from a hymnal book he had smuggled once.
"That was beautiful." A little sister said when he was finished playing.
"Play another one!", another little sister cried. Walter played a few notes to find the tune, then played " Near the cross."
"That was beautiful Walter." Tenenbaum said to him. Walter just smiled. They reached the surface to see the sun setting behind the lighthouse. They finally did it, they escaped Rapture. Now it was time for Walter Reed and Molly to live their new lives together on the surface.