Watch the four teams of the new Essex Base Ball Association, Lynn Live oaks, Lowell Nine, Newburyport Clamdiggers, and Portsmouth Rockinghams, play baseball using 1860s rules. At these fun, historically accurate games, a player pitches underhand, a ball bounced once and caught is an out, and no gloves are allowed. Snacks, baseballs and cards are available for purchase. Grass field seating: bring blankets and lawn chairs, no reserved seating. Weather permitting, please call. Free to Historic New England members, $5 nonmembers.