The Ekirch book referred to is At Day's Close: Night in Times Past [1]. It covers much more than sleep patterns. We think of night as merely the absence of dayl

The Ekirch book referred to is At Day's Close: Night in Times Past [1]. It covers much more than sleep patterns. We think of night as merely the absence of daylight, but in the past it was seen as a different world. [1] http://www.amazon.com/At-Days-Close-Night-Times/dp/0393329011 http://www.amazon.com/At-Days-Close-Night-Times/dp/039332901...