Collecting samples for Darwin was not really in Jonson's and the other sailors' interests but as a paid job, Jonson and his colleagues accepted this task and left London in the HMS Beagle. During the journey, the sailors became bored of constantly eating vegetable broth and desired to search for meat. For the moment, they would abandon the task they had been given. On arrival at Antarctica, the five men travel to the island in a smaller boat. They discover the tracks of a wolf and venture into some caves leading into the lost city of Tinnos, a Polynesian settlement. The sailors then walk across a perilous ice bridge and into a dark cavern. There, they make a discovery. Four strangely carved artefacts. The sailors take these artefacts thinking about the money that they might be worth back in England. Suddenly, the creature that they were tracking appears and attacks Paul. Jonson, Smythe and Henderson flee back into the tunnel but Stephen stays to carry Paul's dying body. As Stephen makes his way to where his colleagues are waiting on an ice bridge, the bridge collapses sending the sailors sliding through a tunnel and crashing through to the outdoors. Paul is dead. The four sailors bury his body and vow not to tell Darwin the truth about Paul's fate, or else they would be back on the strange island to hunt down the canine creature. The sailors leave, continuing their sample collecting across the world.
However, during each visited continent - India, America and the South Pacific Islands - the sailors are murdered or killed, and their artefacts lost to these other continents. It is unknown which artefact Jonson possessed and which continent he died at. It could either be India or America. Stephen was the only one to make it back to London alive.
Jonson can only be seen when the sailors are manning the smaller boat away from the HMS Beagle. Obviously, Jonson was supposed to be amongst the sailors in the caves because Paul comments that there are no artefacts left for Stephen.