A handwritten index to names in the account is appended at the beginning, a list of errata is found at the back, and throughout the account there are marginal annotations and inserted leaves.
Annotations are mostly in ink, some in pencil.
Most of the handwriting seems to bear more resemblance to the handwriting of the Dandridge name than to that of the Thorndike, but it is hard to make meaningful comparisons with such small handwriting samples, and it is possible that the annotations were not made by either of the signers. The handwriting does not appear to be Manasseh Cutler's. Most of the notes are in Latin. It also suggests that the annotator was personally acquainted with Cutler since Hamilton was Cutler's home. They both participated in a trip to the White Mountains in 1804 and both collected plant there.