Towards the end of his life, St. Aelred of Rievaulx wrote his sister a rule for anchoresses at her request. Letter to My Sister is that rule and indeed is the only evidence we have that St. Aelred had a sister. After laying out a daily plan for female enclosed life, Aelred proceeds to provide a series of meditations on Christ's life, death, and resurrection.

There's a lovely metaphor about spiritual garments, but this will most likely only be of interest to medievalists and those interested in St. Aelred. ( )