Question

Why did Helen in 'the shady plot' appears in bits and pieces

Answer 1

because she was the ghost...

Answer 2

Hi there!

The 'Helen' [ Ghost ] worked in the Writer's Inspiration Bureau. She and other co-ghosts were supposed to help John Hallock and other writers to get plots and ideas for their stories...

John would call her to write a story all night long and Helen was completely tired. Also, people used Ouija board to ask the ghosts silly questions and this way they could not get any sleep.

This made it difficult for 'Helen' to appear completely.
Thus she appears in bits and pieces.

[ Thank you! for asking the question. ]
Hope it helps!