A Whirlwind Year in the Field: Elsmere, Swann Oyster House, Rich Hill, and Mulberry Grove on June 28, 2026 18th-Century Kitchen CCASM Early Woodland Education Elsmere John Hanson Late Archaic Mulberry Grove Patuxent River Piscataway Potomac River Rhenish Stoneware Rich Hill Swann Oyster House Teagues Point +