It's best to return it directly to Mrs. Zeigler or a librarian. Leaving material out on the circulation desk is not a good idea because someone could pick it up by mistake. Keeping ILLs longer than the specified due date jeopardizes our relationships with other libraries. In other words, we may not be able to borrow items from other institutions if we return items late. It's extremely important that all ILL material is returned promptly.
Forms are available at the reference desk.