What was the last song played?

Everyone asks the question "What was the last song played on Titanic?" Well, we know for sure it is either Nearer my God to Thee or Autumn. A lot of survivors said it was Nearer my God to Thee, and only 1 person said it was Autumn. Wallace Hartley reportedly told a friend that if he were on a sinking ship, he would play Nearer my God to Thee. All evidence we have points to Nearer my God to Thee. But what version? There is the Horbury version, which is British. Then we have Propior Deo, also British. Last but not least, we have the Bethany version, which is American. Now, Wallace Hartley was British and probably wouldn't play the Bethany version. So it's either the Horbury version or Propior Deo. His parents are certain he would play Propior Deo, and therefore I say it was Propior Deo. However, there is even more evidence to back up the idea that he played the Propior Deo version. Wallace Hartley was a Methodist, and Propior Deo is the Methodist version. Therefore, again, that's why I think the Propior Deo version was played. However, you can believe either version or song because there is no definite answer to this question.