From memory the Petrie Museum made facsimile notes available electronically, either free of charge or for a modest charge.

In reality I did not find the notes much use. Not many notes, considering the volume published, and difficult to read. I didn't keep them. I was hoping to find extra information on one or two matters, rather like you, but I wasn't interested in the Granite Leaf.

The British Museum have copies of Petrie's work on Inductive Metrology, and an early work on the pyramids, both of which I found interesting, but I thought both were flawed.

Mark