At Audley End, the 1551 edition of Appian of Alexandria's Roman History is bound together with the 1548 edition of Dionysius of Halicarnassus' Roman Antiquities. We looked at Henry Neville's annotations in this copy of Roman Antiquities in Part 2. The Appian section of this book also some annotations. Some are likely by Henry Neville, but some also appear to be by Henry Savile.
Unfortunately, I have not examined these books myself, I am doing my best to reconstruct the facts via photographs.
Here is the Billingbear Book List entry for the book, I have underlined it in red:
Here is the USTC entry for the book and you can see a title page of that edition here, and read the whole book on Google Books:
The first annotation is from Dionysius. Here is the full page:
Here is the annotation:
Savile had extremely distinctive and difficult to read handwriting. Here is an example of his handwriting:
Savile made a very distinctive "g". Compare to the annotation:
The lower case "p" is also a match:
This is important because it establishes the provenance of these books and links them directly to Henry Neville. But of course, these books were at Henry Neville's family home of Billingbear. So we should expect them to have been his.
Annotations in Appian
This annotation on page 255 is also likely Savile's handwriting:
Page 256