security locks for pocket doors

Does anyone know how to secure pocket doors? Now we just have dead bolts from the inside that were there when we purchased the brownstone a year ago. I want to be able to enter our parlor floor from the pocket doors. We rent the 2nd and 3rd floor so I need more than just a privacy lock. But I do not want to alter too much the character of these doors that have already seen there share of careless attempts at security

By rose d |