Hi all
Susan, I did look directly in the top of the nest and you are right about getting just the right angle to get up there. Also, there are 2 cupboard doors that open in the library; one is a single; the other is a double door.
Pete, I had the top at one time, but during a 'brain [blip]' tried to capture the wax Ixupi with it and lost it.
I want to thank everyone who has posted; wel-wishers and those who gave me help.
I started a new game, under a different name, while saving my old one. I got about 1/2 way through and while I was in the clock tower; got an idea.

While I was searching the new places people told me about, I would put my inventory piece in the space where one would have been, just to be sure I was looking in the correct spot. (I never did find the spot in/around the toilet.) I did not do this for places, that I had found on my own; just looked and left. I saved and went back to my first game and the clock said 5:35 and the face was different - I reset the clock and

there was my top.
I honestly thought I would never get to see the finale -- but I did; about 3 minutes later. Now as long as I have started a second game, I think I'll see if I can beat my first score, before I start Shivers II.
Again, Thanx to everyone. As I use walkthroughs from this site, when I get stuck, I don't use the forum very often (the walkthroughs are great!), but when I do, I always find very friendly, helpful people.
Anderbauche