JSP notes the marginal characters in BOA manuscripts, note that some of them come from the Grammar and Alphabet documents.
"Book of Abraham and Related Manuscripts," The Joseph Smith Papers website, accessed September 23, 2021
The Kirtland-era manuscripts contain the first portion of what would later be published as the Book of Abraham, along with Egyptian characters copied in the left margin. Most of these characters were copied from the papyri, but few of them are found in the Egyptian Alphabet documents or in the Grammar and Alphabet volume.