I went up to visit on Saturday and all was well.  The eyasses are now much more active and visible.  They’re at the stage were they enjoy sitting near the edge of the nest and keeping an eye on the world. 

I couldn’t stay long.  The mother was on a finial near the nest and the eyasses were using both sides of the nest to look out.  (This makes it difficult to watch them as one has to walk half a block to get a clear view of the left side.)