I can't tell you why there's a delay, but stick your head out of the window and you'll know why.
It has always been my practice to cast a long paragraph in a single mould, to try it by my ear, to deposit it in my memory, but to suspend the action of the pen till I had given the last polish to my work.
I didn't really want to do another sequel. I go to those movies, and I just sort of enjoy them like a viewer.