Volunteers are sought to be docents for walkers on Tumamoc Hill, providing information about the archaeology and anthropology of human habitation, and the changing nature of plant and animal life. Training takes place from 10 a.m. to noon, Saturday, Feb. 25; and from 6 to 8 p.m., Wednesday, Feb. 29. Registration is required. Email [email protected], or visit tumamoc.wordpress.com for more information.