Mary,

At the request of Bob Shults, I am attaching our proposed form of 
Non-Disclosure Agreement.  Please call me or Bob with any comments or 
questions you might have.  My phone no is 713/853-3399 and Bob can be reached 
at 713/853-0397.  If the agreement meets with your approval, please fax a 
signed copy to me at 713/646-3490.  We look forward to hearing from you.