As an army doctor, he travelled across a great range of villages and settlements, from which he recorded traditions and legends.
Karkavitsas wrote in the European tradition of naturalism (exemplified by Émile Zola), which does not shrink from portraying the seamier parts of life among humble people, rather than romanticising or embellishing reality.
He was a folklorist with a gift for spinning tales full of authentic details of simple people's lives, local customs, dialects and folktales, as well as psychological insights about them.
"The Beggar" is a novella about con-men, violence and the grotesque practices of professional beggars (including purposely maiming children to turn them into profitable objects of pity).
"Words from the prow" is about the lives of seafarers, fishermen and sponge-divers, full of arcane details of their craft as well as folk-tale-inflected plots of tragedy, shipwreck, hands lost at sea, murder, superstition and the supernatural, as well as the joys of making a living off the sea.