What has the author Eustase Grammont written?

There is no known author named Eustase Grammont. It is possible that this is a fictional name or a misspelling of a real author's name.

Could you please provide more context or information about this author? For example:

* Where did you encounter this name? Was it in a book, a website, or a conversation?

* Do you have any other details about their work? Genre, time period, or any specific titles?

With more information, I might be able to help you find the author you're looking for.