Uncle Titus Jones
The Mystery of The Invisible DogUncle Titus Jones is a buyer and collector at The Jones Salvage Yard, the family salvage business whose varied stock supplies both curious visitors and Jupiter Jones’s inventive detective work. His eye for unusual objects makes the yard more than a heap of discarded things: it is a store of possibilities, where damaged equipment can acquire a second use.
The salvage yard and its collections
The yard is owned by Uncle Titus and Aunt Mathilda. Uncle Titus does most of its buying, bringing together ordinary junk and objects that catch his interest. Visitors come from around Southern California to browse its finds: reclaimed wooden panelling, ornate iron fences, marble mantels, claw-footed bathtubs, and brass doorknobs and hinges. Among these wares is a pipe organ that he loves and refuses to sell at any price. His attachment to it distinguishes the yard’s stock from mere inventory: some objects matter to him beyond their possible resale.
The yard also has a less welcoming face. Early one December morning, Bob Andrews and Pete Crenshaw arrived to find its great iron gates padlocked and no bargain hunters among the heaps. The episode establishes the yard as a working business with closed gates, as well as a place whose unusual contents draw browsers when it is open.
Work, family, and Jupiter’s workshop
After Christmas, business at the yard is slow, and Jupiter is available to help. Aunt Mathilda directs him to sort a newly arrived load of small appliances, testing what works and what can be repaired; she jokes that he will probably buy half of them himself. The assignment reflects how the family business combines practical labor with the chance to find useful castoffs.
Jupiter is indeed alert to that chance. He looks for objects that can be made into detective equipment, and the investigators’ headquarters is filled with devices he has repaired or rebuilt from odd parts, including walkie-talkies, a telephone loudspeaker, a tape recorder, and a periscope. Most of the money he earns working in the yard goes into this equipment. Uncle Titus’s collecting and the yard’s supply of salvage therefore help sustain Jupiter’s workshop, even though the actual rebuilding is Jupiter’s work.
Salvage put to investigative use
A particularly clear instance is the closed-circuit television system Jupiter later uses to watch Sonny Elmquist. The system had belonged to a store that suffered a fire; its cameras and monitors were damaged, and Uncle Titus bought them for almost nothing. Jupiter repaired the set and carried it, with clean clothes in a knapsack, to the bus stop. Because Fenton Prentice’s apartment has no windows opening onto the balcony, the investigators need the equipment to observe the courtyard without revealing that they are watching.
The camera system brings together the yard’s defining qualities: fire-damaged objects, Uncle Titus’s bargain buying, and Jupiter’s ingenuity. Uncle Titus does not operate the surveillance or direct the investigation, but his purchases make possible a tool that lets the boys watch discreetly. Through the salvage yard, discarded or broken things become part of the investigators’ working equipment.

