IT HAS BEEN A busy few days for ‘Abdu’l-Bahá since his arrival at Green Acre, a unique retreat center alongside the Piscataqua River that serves as a crossroads for many of the spiritual quests that characterize America in the early years of the twentieth century.

In the week ahead: Fred Mortensen rides the rails to visit ‘Abdu’l-Bahá, a look at Green Acre’s remarkable founder Sarah Farmer, and ‘Abdu’l-Bahá travels fifty-five miles south to Malden, Massachusetts just outside of Boston.