Los Angeles is the metropolitan reference point for the setting of the Three Investigators’ adventure, while the boys’ home is the coastal town of Rocky Beach, California, on the city’s outskirts. The story makes the distinction useful: Los Angeles establishes the wider region, but the mystery takes shape in a compact local landscape of streets, residences, a park, and a church.

Regional Setting

The boys—Jupiter Jones, Pete Crenshaw, and Bob Andrews—live in Rocky Beach, a coastal town described as lying on the outskirts of Los Angeles. That geographical framing places their investigations within the orbit of a major city without locating their home in the city itself. In this adventure, Los Angeles remains a broad point of orientation; the narrative’s specific movements and clues belong to the boys’ nearby streets and buildings.

The Local Landscape

At twilight in late December, the boys arrive at Paseo Place. They pass a park where a few roses are still blooming despite the cold, then a stucco rectory and a small church whose stained-glass windows are lit while an organ sounds inside. Beyond the church stands an apartment house with garages at street level and two storeys of apartments above. Its carefully drawn curtains give the building a closed-off appearance, a visual counterpoint to the investigation that will pry into what is happening nearby.

The setting is also defined by its short, practical routes. From the apartment building, the boys go down through the courtyard and leave by a rear passage that runs past a laundry and storeroom, up steps, and into an alley. The alley opens onto the backs of buildings and garages on the next street. Directly behind Fenton Prentice’s apartment house is 329 Lucan Court, a one-storey frame residence where Charles Niedland answers the door. The connected properties make proximity part of the mystery: places that seem separate from the street are joined by passages and neighboring buildings.

Role in the Mystery

The same close-knit geography shapes the search for the burglar. After the break-in on the next street, police fill the neighborhood and search St Jude’s Church. Jupiter explains that the fugitive used the church as cover, putting on a cape and mitre and posing as a statue while officers looked nearby. The church is therefore not merely a landmark on the boys’ route; its interior offers a hiding place in the middle of an active search.

Later, the apartment-building pool becomes another revealing feature of the local setting. Jupiter recovers the Carpathian Hound from the bottom of the water and explains that the burglar lowered it on a gilt cord. Against the pool’s irregular blue-and-gold tile pattern, the cord was difficult to see. Across these episodes, the Los Angeles-area setting narrows into an intimate network of adjoining streets and shared spaces, where ordinary features of the built environment—an alley, a church, a pool—make concealment possible and help expose how the crime was carried out.