To what is the usher a bounden slave to?

The word "usher" is typically used to describe a person who shows people to their seats, often in a theatre or other event venue. There's no inherent sense of being a "bounden slave" to anything in their role.

However, you might be asking this question in the context of a specific work of literature or theatre.

* If you can provide more context, like the name of the play or book, I might be able to give you a more specific answer.

For example, if you are thinking of a play where the usher is presented as being subservient to the patrons, it's possible they are bounden to their duty to serve them, potentially to the point of feeling like a slave to their demands.

Please provide more information so I can help you better!