What has the author Hugo von Helvig written?

There is no known author with the name Hugo von Helvig. It's possible there is a misspelling or that this is a fictional name.

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

* Where did you encounter this name?

* Is there any more information available, like a book title, publication year, or genre?

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