- Tommy the retriever: A black, overgrown pup "who was always slobbering... Most of his head was usually a red, idiotic, slobbering grin of appreciation of his own silliness. He seemed to take life, the world, his two-legged mates, and his own instinct as a huge joke."
- Dave Regan: A laid-back gold miner, who is fond of fishing. It is Dave's idea to use a cartridge to catch fish.
- Andy Page: A fellow gold miner, who "usually put Dave’s theories into practice if they were practicable, or bore the blame for the failure and the chaffing of his mates if they weren’t."
- Jim Bently: Described as being uninterested in the "damned silliness" of Dave and Andy's scheme. He enjoys eating fish, but has no interest in fishing.
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