twelve. Now, Gaston, play the Invitation A la Valse."

"Why?"

"To please me, first of all, and then because I never can manage
to play it myself."

"What part do you find difficult?"

"The third part, the part in sharps."

Gaston rose and went to the piano, and began to play the
wonderful melody of Weber, the music of which stood open before
him.

Marguerite, resting one hand on the piano, followed every note on
the music, accompanying it in a low voice, and when Gaston had
come to the passage which she had mentioned to him, she sang out,
running her fingers along the top of the piano:

"Do, re, mi, do, re, fa, mi, re; that is what I can not do. Over
again."

Gaston began over again, after which Marguerite said:

"Now, let me try."

She took her place and began to play; but her rebellious fingers
always came to grief over one of the notes.