For The Woman behind the Lens, Berch has had to ferret out the nature of Johnston's relationship with Mattie Edwards Hewitt.... Interpreting their letters' sentiments, the biographer writes, 'is hardly straightforward. Some scholars advise us to understand all the romantic outpourings between nineteenth-century women as expressions of female friendship, rather than sexual passion. Others are more inclined to see such writings as a clue to a greater,...