Exactly what the title says.
I don't know if this was Cliff's general playing notebook, or if it was collected works, but it is pretty cool.
Much of this is already in general circulation, but these might be better copies. Much of this binder has the original handwritten documents. There are a few pieces in here that I had not seen before.
https://archive.org/details/cliff-spaulding-notebook-of-music/