A postcard started this book, in a way. 
My sister sent it to me, and looking at the picture I thought, sisters.  
I turned the card over and Mariann had crossed out the word ‘friends’
in the descriptive caption and written ‘sisters’ above it.  I was fascinated
by the two women.  I was convinced that they were close, that they had a
bond that weathered all   time and storms.  I wanted to know what they were talking about, what their lives had been like.