Littlegood-Briggs, Sylvia - Old Children

Jack, walking with vague purpose, heard the child, trapped under fallen stones, crying on the other side of the wall. He rescues the child, only to see it seemingly disappear.
Jack is noticed, however, by a woman who advises him that queer things happen where he is, Hunters’ Wood, and worse at the top, Birdyard.
She introduces herself as Polly, then offers him job at her home, Blackwood Cottage, where she wants a stone wall built, rather a stone maze.
As mentioned, Jack has been noticed. He has a quality “not quite of the fields we know, with more than a touch of the fields don’t know.”
This section, Jack’s observations, training, experiences, make for engaging reading. Two thirds in, however, the author pivots the narrative, dropping Jack into the realm of the Fairy Feller. Jack is added into a caravan, similar to those of Edith Bikker’s The Night Of Turns.
For me, this proved to be a narrative error and I found myself reading with diminished involvement. It seemed as if Littlegood-Briggs lost interest in her own tale, or if she simply lacked the story-telling ability to properly fill and conclude the opening section.
What is here, is excellent, despite the feeling that the two halves have been crazy glued together.