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                     1851
                     
                    
                     
                     No.2. Plan of that part of the Isthmus o
                     
                    
                     
                     Separate Map
                     
                    
                     
                     Plan of that part of the Isthmus of Tehu
                     
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                     1851
                     
                    
                     
                     No.5. Map of the Coatzacoalcos River fro
                     
                    
                     
                     Separate Map
                     
                    
                     
                     1851 Tehuantepec Survey, Major J.G. Barn
                     
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                     1851
                     
                    
                     
                     No.6. Map of the River Uspanapa to the P
                     
                    
                     
                     Separate Map
                     
                    
                     
                     Tehuantepec Survey, Maj. J.G. Barnard. U
                     
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