Ethel Nokes was active from the 1930s to the 1950s, and wrote several children’s stories. Several of her works were published by The Religious Tract Society, so were presumably evangelical in character.
Finding the books:
Nibs is extraordinarily hard to find, but her other books are easy to track down, and usually reasonably priced.
Links and sources
The British Library
Many thanks to Lisa Catz for the picture.