Check out Paul Helm's review of Cynthia Aalders' monograph, To Express the Ineffable: The Hyms and Spirituality of Anne Steele.
Steele (1717-1778) was an 18th C hymn writer much loved in both the UK and the USA. She is significant because she was
(a) the first major female hymn writer, and
(b) the most popular Baptist hymn writer ever.
You can read it here. Then you can buy the book here.