The Three Investigators

#5 The Mystery of the Vanishing Treasure by Robert Arthur, 1966.
The Three Investigators don’t have a case at the moment, so Jupiter entertains himself and his friends with an intellectual exercise – figuring out how someone could steal the Rainbow Jewels from an exhibit at the Petersen Museum, an exhibit that has been promoted in the local papers. Pete and Bob object that they solve thefts, not commit them, but Jupiter says that figuring out how a theft could occur would be useful in helping them understand thefts that actually occur. The boys go to the museum to see the exhibit and study it for security weaknesses.
While they are at the museum, a theft actually occurs, but not in any of the ways that Jupiter predicted that a theft could occur. It happens in broad daylight, with a room full of people and security, and the object that was take, a golden belt, was actually the heaviest and least portable object in the exhibit. Jupiter and his friends witness the start of the crime when Jupiter runs into an old acquaintance from his childhood acting days. This actor gleefully tells Jupiter to watch the stunt that he’s going to pull. He pretends to feel faint and then drops a fake jewel that looks like one of the real ones. This is a distraction for the guards, who are all focused on him when the real theft happens. The actor is in trouble for providing the thieves with a distraction, but he tells the police that he was hired to do it both to prove himself for a role in a movie and as kind of a publicity stunt. Of course, the movie wasn’t real, and he was just duped into helping the thieves.
Jupiter is intrigued by the theft and offers the Three Investigators’ services to the man in charge of the exhibit, but he turns them away because they’re kids. However, they soon have another mystery to consider. An elderly children’s author thinks that she is being stalked by gnomes. She lives in the same old house where she grew up, and she is known for writing books about gnomes, inspired by stories that her old Bavarian nanny told her. Years ago, she used to invite neighborhood children to her house for parties, playfully calling them her “gnomes”, and she would read to them from her books. However, the old families have grown up and moved away, and many of the old houses around her have been torn down and replaced with shops and businesses. The author doesn’t want to sell her house, even though she’s been pressured to sell by a developer, but lately, strange things have been happening at the house. She keeps seeing little men dressed like gnomes, and they play mean tricks on her. She swears that she’s not dreaming or crazy, which is what her nephew seems to think. She does genuinely believe in gnomes, but what’s been happening could also be someone playing a trick on her.
The Three Investigators might think that she was imagining things, except that Bob sees one of these gnomes out the window while they’re talking to the author. The boys try to chase after it, but it disappears before Jupiter and Pete can even get a look at it. They consider the idea that Bob could have imagined the gnome, based on his reading about them and the author’s stories, but he swears he didn’t. They decide to approach the situation from the assumption that someone is playing tricks on the author, and Jupiter and Pete decide to spend the night at the author’s house to see what happens.
While the boys are exploring the area, they decide to check out the defunct movie studio next to the author’s house. There, they overhear the developer who wants to buy the author’s house talking to the security guard at the old studio. What they say makes Jupiter wonder if they could have something to do with the theft of the gold belt, but when they discover the boys listening, they insist that Jupiter misheard them.
The son of the man in charge of the exhibit at the museum comes to consult the Three Investigators about theft of the belt, having overheard them offering their services to his father. Jupiter gives him a suggestion to check on while the Three Investigators look into the matter of the gnomes. Jupiter’s first guess about the theft of the belt isn’t quite right, but it turns out that there is a connection between the gnomes and the theft. The gnome incidents could be part of an effort to pressure the author into selling her house to the developer, but the digging sounds that accompany the gnomes make Jupiter realize that the gnomes have other motives.
The book is available to borrow and read for free online through Internet Archive (multiple copies).
My Reaction and Some Spoilers
Many of the Three Investigators mysteries are a little like Scooby-Doo mysteries, with ghosts, monsters, or other supernatural phenomena that have logical or human explanations. I like this mystery because gnomes are an unusual mythological creature to find in that kind of story. There are plenty of mystery stories with faked ghosts but few with staged gnome appearances. It’s a little bit of a spoiler to say that the gnomes are fake, but not much of one because that is really the assumption from the beginning. The children’s author believes in gnomes, but nobody else does, and even the author isn’t convinced enough to stop her from hiring the investigators to look into the situation.
The introduction of the theft of the golden belt from the museum at the beginning of the story introduces the idea that the theft is somehow related to the gnome appearances, and that is the case. What complicates the situation is that there are different people involved with both the gnome appearances and the thefts, and not everyone who’s involved in one plot is necessarily involved in the other. One of the complications of the story is figuring out who is involved in what and who is the ultimate mastermind behind the main mystery.
The gnome appearances also put this mystery into the category of mysteries that I call Mysterious Happenings – where something strange is happening with no obvious explanation, and much of the mystery involves figuring out the motive behind the mysterious happenings, which is usually related to an actual crime that is initially unknown to the investigators. A classic example of a Mysterious Happenings mystery is the Sherlock Holmes story, The Red-Headed League, which involves a man who is invited to join a club that requires him to do some meaningless busy work for money but which he suddenly discovers is fake. In that case, the mystery is figuring out the purpose of the club and why someone would play such an elaborate prank on this particular man. This Three Investigators story has a similar premise to the Sherlock Holmes story in the sense that someone is playing an elaborate prank on the author with the gnome appearances, and the question is why anyone would do that. Part of the reason that I mention the Sherlock Holmes story is that the motive behind the prank in the Sherlock Holmes story is the same as the motive for playing the prank with the gnomes, making me think that the author was inspired by The Red-Headed League.
As for who/what the gnomes are, the presence of the old movie studio and the use of a hired actor to create a distraction in the museum are clues. It’s also important to the story that it was children’s day at the museum, so there were a lot of kids on the scene when the theft happened. I suspected who was playing the part of the gnomes from the beginning, but I didn’t guess the full motive for the crime, even though The Red-Headed League is one of my favorite Sherlock Holmes stories. There’s a dramatic scene at the end of the book where the “gnomes” storm the kids’ headquarters at the salvage yard to retrieve the golden belt from Jupiter after Jupiter figures out where they hid it.





















