Trustee from the Toolroom (1960) is an adventure story by English author Neville Shute (1899-1960).

Keith Stewart writes how-to articles for a magazine called The Miniature Mechanic.

Keith and his wife Katie have been left to care for their 10-year-old niece, Janice, while the parents, head off on a yachting jaunt.

Tragically, Janice’s parents die in a shipwreck.

Keith embarks on a journey to retrieve diamonds from the shipwrecked yacht. He wants to do this so that Janice can have the financial future she’d have had if she wasn’t orphaned.