Mmm - German is not one of my strong points. I am struglling with it and I need it (seriously) later in the year. I looked up a dictionary and yes it means Dance Macabre. I went and found the score and it is titled "Jig for Feet - (Totentanz)".
As the MM is for dotted crotchets at 120, it really is anything but macabre. So I am wondering if this is William's little joke.