Spent about 40 min. meditating today. Overt inner chatter gave way to calm soon enough, but the deeper levels of silence were elusive. I remainedin a calm state for a while, with occasional inner fragments of monologue arising, then began to feel a subtle fluttering in my crown. That gave way to a more sustained stimulation in my crown, and my inner calm shifted to something like a more stable reflection on silence, although at the fainter peripheries of my mind I could sense the agitation of chatter still going on. 

Really, I could do a whole challenge – or spend a whole lifetime – doing silent meditation, but tomorrow I will begin mantra work. I may try to do twenty minutes of silent meditation a day in addition to the mantra practice.