What has the author Leopold de La Houssaye written?

It seems you're asking about Leopold de La Houssaye, but there doesn't appear to be a well-known author with that exact name. There are a couple of possibilities:

* Typo: Perhaps there's a misspelling in the name. If you can double-check the spelling, it might help identify the correct author.

* Less Known Author: It's possible this is a lesser-known author, and finding information about their works might require more specific details.

To help me assist you further, please provide more context:

* What kind of works are you looking for? Novels, poetry, essays, etc.?

* Do you have any additional information about the author? Dates they lived, nationality, any other works they might have written?

* Where did you encounter this name? A book title, a bibliography, an article?

With more details, I can hopefully help you find information about Leopold de La Houssaye's works.