Proof that Lincoln was a music-lover?

[RJNorton]

I checked Tom Bogar's American Presidents Attend The Theatre, and Lincoln attended the performance of The Magic Flute on March 15, 1865, at Grover's Theatre. He was not feeling well, but he was able to make it to the show. Along with wife Mary, the others in the party were Clara Harris and Col. James G. Wilson.

Tom writes that Mary wanted to leave before the show was over, but Lincoln insisted on staying. He said, "Oh no, I want to see it out. It's best when you undertake a job, to finish it."