Question: Well, I learnt that Miss Howard had been on afternoon duty on Tuesday, and that "a convoy coming in unexpectedly "she had kindly offered to remain on night duty, which offer was gratefully accepted.
Miss Howard had been free on Tuesday and had not been keen to take on the night duty.

Answer: no

Question: Suppose they should find her dead stricken down by the hand of Mr. Brown?
If she dies, then we'll never know what happened.

Answer: it is not possible to tell

Question: to display in a manner available to a person under 18 years of age
It was laid out in a way that would be permitted for a minor to view.

Answer:
yes