The Invisible Hound
The Mystery of The Invisible DogThe sculpture’s transparency, its hiding place, and the boys’ close observation turn an apparently vanished artwork into a solvable physical mystery.
increasing
Bearing strength in each event
decreasing
A Crystal Original

A Crystal Original
Art with a history
Charles Niedland explains that his brother Edward made the Carpathian Hound from crystal and gold. Its craftsmanship makes it difficult to replace and easy to recognize.
A practical problem
The sculpture is small enough to conceal but distinctive enough to attract suspicion. Recovering it requires understanding not only who stole it but where it could disappear.
Color Against Color

Color Against Color
A visual clue
Jupiter Jones remembers the pool’s blue and gold tiles and considers how a clear crystal object might blend into that pattern. The scene’s decoration becomes relevant evidence.
The overlooked surface
A gilt cord could disappear against the same colors. What looks like an empty pool may contain a carefully placed object in plain sight.
A Transparent Precedent

A Transparent Precedent
An old puzzle recalled
Jupiter Jones remembers a story in which a glass knife vanished when placed in water. The comparison reframes invisibility as an effect of material and setting.
A decisive inference
He connects the principle to Prentice’s missing sculpture. The solution is not a secret passage or supernatural power, but a transparent object concealed in a familiar place.
The Pool Search

The Pool Search
A risky retrieval
With the building nearly empty, Jupiter Jones enters the cold pool and scans its tiled floor. Fenton Prentice and Charles Niedland watch anxiously from the edge.
The sculpture found
Jupiter lifts the Carpathian Hound from the water, its cord explaining how it was lowered into place. The supposed disappearance becomes a matter of camouflage and patience.
The Hidden Dog Replaced

The Hidden Dog Replaced
A deliberate decision
Jupiter Jones returns the sculpture to the pool, hoping its thief will come back for it. Prentice reluctantly accepts the risk because the staged recovery may expose the criminal.
A watcher’s position
The boys use a concealed camera and balcony stakeout to observe the courtyard. The Hound becomes bait in a carefully controlled test.
The morning after the burglary
The day Jupiter examines the courtyard pool
After the poison and car attacks
The afternoon before the ransom meeting
The afternoon before the ransom meeting