Can you describe the two devotees, Anna and Mavshibai, and the nature of their service to Baba?

Chapter 24 provides details about these two devotees. Damu Anna was an older man, described as having crossed fifty with no teeth in his mouth. He served Baba by pressing his left hand. Mavshibai, whose original name was Venubai Kaujalgi, was also of a mature age and was a widow. Baba himself called her "Mother" (Aai). She was known for her incomparable devotion and pure heart. Her method of service was particularly intense; she would press and churn Baba's stomach with both hands, as if grinding buttermilk. Though her extraordinary pressing style made Anna feel pity, Baba seemed completely at ease with her fearless and loving service.