Map of the Patuxent and St. Mary's Rivers Maryland  From Surveys by Major J. J. Abert Top Eng and Maj J. Kearney Top Eng in 1824 (1857) 

 -  1857 
 -  Copy from NARA  15" x 24"  
<br/><br/> Shows water depths, and some land features including dwellings and owner's names.