| Introduction The Claggett Retreat site (18FR25) describes a Late Woodland   hamlet located on the north bank of the Monocacy River just east of the present   town of Buckeystown, in Frederick County, Maryland.  Diagnostic ceramic styles, a radiocarbon date   and the pattern of features at the Claggett Retreats site place it culturally   within the Mason Island Complex, the earliest of three Late Woodland cultural   manifestations identified in the Middle Potomac Valley. Archaeological   Investigations The Claggett Retreat site was located by avocational   archaeologist Calvin Swomley in 1964.    The site was officially recorded by Spencer Geasey in 1970.   Formal investigations at the Claggett   Retreat site began with two visits to the site as part of the Monocacy River   Regional Survey between 1978 and 1982.    The Archaeological Society of Maryland (ASM) in cooperation with the   Maryland Historical Trust (MHT) and the American University Department of   Anthropology  Potomac River   Archaeological Survey (PRAS) sponsored excavations at Claggett Retreat in 2007   and 2008.  These field sessions served as   the ASM's Tyler Bastian 36th and 37th Annual Field Sessions in Archaeology.   The Claggett Retreat site is the only single component Mason   Island site that has been identified in the Middle Potomac Valley.  The AMS/MHT/PRAS excavations in 2008 and 2009   offered the opportunity to systematically collect and analyze plant   macro-remains and to make a significant contribution to better understanding   Native American subsistence practices and environmetal conditions in the   Potomac River Valley during the early Late Woodland period.  Soil samples for flotation processing were   collected from seven cultural features excavated at the Claggett Retreat site.   Samples were placed in storage at American University awaiting analysis.  In 2009, the Archaeological Society of   Maryland committed funds to support the processing and study of the Claggett   Retreat site archeobotanical collection.   Archeobotanical   Studies                Seven archaeological soil samples from seven cultural   features excavated at the Claggett Retreat site (126.5 liters) were analyzed by   Justine McKnight in 2010.   Samples were   flotation processed in a Flot-tech machine, resulting in the recovery of 75.545   grams of carbonized plant macro-remains (a mean average of 0.587 grams per liter   of floted soil).  The recovered   archeobotanical remains were both abundant and diverse, and the condition of   recovered organic remains was excellent. A wide variety of economically   important plants were represented in the analyzed assemblage:  These include a predominance of wood charcoal   (dominated by hickory and white oak species); maize; sunflower; three genera of   native mast; wild fruit, grain and ruderal seed; and miscellaneous plant   materials including fungi, and amorphous carbon.  In addition, non-carbonized seeds were   present in 100%  percent of the analyzed   samples.   Data generated from the study of seven flotation samples   collected during two seasons of field excavation at the Claggett Retreat site   (18FR25) make an important contribution to our understanding of Mason Island   Complex plant use in the Middle Potomac Valley.    The site botanical assemblage offers a wealth of data regarding   subsistence and land use during the early Late Woodland period.   It is significant that while the Mason   Island occupants of the Claggett Retreat site successfully farmed maize and   sunflower, they also relied heavily on the seasonally-predictable wild fare   available from a rich local forest environment.    Importantly, the new data from Claggett Retreat corroborate the rich   archeobotanical dataset generated from Mason Island features at the Barton Site   (18AG3).  Together, the evidence from   these two related sites builds a clearer picture of the cultural traditions   associated with Mason Island ethnobotany.  
        
          
            | Context | Lab Number | Measured Age | Cal 2 Sigma low | Cal Median Probability | Cal 2 Sigma high
 |  
            | Feature 251 | Beta 275419 | 400+/-40 BP | 1278 | 1345 | 1398 |  As part of a cultigen dating project supported by the   Maryland Archaeological Conservation Laboratory in 2009/2010, a maize cupule   fragments from Feature 34 (a shallow basin) at Claggett Retreat were selected   for direct radiocarbon dating using the AMS technique. The sample produced an uncalibrated   radiocarbon date of 400 +/40 BP/AD1550.   Click   here to see graphic representation. References 
        
          | Dent, Richard J. |  
          |  | In press-Report on Archaeological Investigations at the   Claggett Retreat Site(18FR25), Frederick County, MD. |  
          |  |  
          | McKnight, Justine |  
          | 2010 | Report on The Analysis of Flotation-recovered Archeobotanical Remains from the Claggett Retreat
            Site (18FR25), Frederick County, Maryland.  Report submitted to the Potomac River Archaeological
            Survey, Department of Anthropology, American University. February 3, 2010. |  
          |  |  
          | McKnight, Justine W. |  
          | 2010 | Analysis of Flotation-recovered Archeobotanical Remains from the Claggett Retreat Site (18FR25),
        Frederick County, Maryland. Maryland Archaeology, Volume 46; Numbers 1 & 2; pp 38-46. |  |