Below is my 100-word story based on the above prompt.
Stolen from grandfather's vault containing precious valuables, only a pitiful amount of jewels turned up. They arrived via an unknown source, in battered, brown, envelopes stamped with out-dated Air-Mail markings. The return address in Mexico was a burned-out empty lot strewn with garbage and broken liquor bottles.
After years of frustrating dead-ends, the private detective had his first lead. A baby's pink, hard-plastic teething ring packed among the jewelry. Oversight or tip?
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