Furthermore, organ builders were at liberty to construct their register crescendi so that stops entered either one at a time or in groups of two or more. […] Of course, a sensitive organist would not rely wholly or even predominantly upon a register crescendo to effect stop changes, particularly when those changes had more to do with simple manipulation of tone color than with progressive crescendi.

He kept his family out of harm's way.

Richard DeLongpre: I have to say, we were surprised that Principal Gottlieb wasn't more accommodating. Judith Gottlieb: Oh, for God's sake, he's a child. I'm not gonna date him.

Die Zauberflöte, K. 620