Does anyone know which book is mentioned by Mr. Nunnerley:

“ The theme of purification, inward as well as outward, was developed at meetings in Exeter and the withdrawal of this book and the wicked exhortation to burn it, has weakened this side of the truth so sorely needed at the present time. Appalling moral evil has come to light in leading men, meticulous as to outward separation, in the very city where the book was first attacked.” ?

Probably 'Purification and Life' by GR Cowell - Exeter, August 1958.