I denne episoden er det bare Maria og Andrea tilstedet. Andrea er med fra Spania og Maria forteller om en mann og hans bavian på slutten av 1800tallet.
http://www.railwayaccidents.port.ac.uk/the-case-of-the-monkey-on-the-railway/
https://historydaily.org/jack-baboon-operated-railway-earned-salary-never-made-mistakes/2
https://www.mentalfloss.com/article/559031/signalman-jack-baboon-worked-railroad-south-africa
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