POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature       
appears above hereby constitutes and appoints James C. Edenfield and Peter      
W. Pamplin, or any one of them, as true and lawful attorneys-in-fact and        
agents with full power of substitution and resubstitution, for him and in       
his name, place and stead, in any and all capacities to sign any or all         
amendments, including post-effective amendments, to this Registration           
Statement, and to file the same, with all exhibits thereto, and other           
documents in connection therewith, with the Securities and Exchange             
Commission, granting unto said attorneys-in-fact and agents and each of         
them, full power and authority to do and perform each and every act and         
thing requisite and necessary to be done in and about the premises, as fully    
to all intents and purposes as he might or could do in person, hereby           
ratifying and confirming all that said attorneys-in-fact and agents or any      
of them, or their or his substitute or substitutes, may lawfully do or cause    
to be done by virtue thereof.                                                  
    

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