David Two Arrows and Saskia Vanderhoop, founders of Sassafras Earth Education, will be at Polly Hill Arboretum on Wednesday, Sept. 14, from 5:30 to 6:30 pm to discuss acknowledgement of indigenous peoples and territories, representation of the history of the Wampanoag people, ancestral skills and knowledge, and strategies of repair and activism. Free event. Register at bit.ly/Learning-How-to-Be-on-Wampanoag-Land or call 508-693-9426.