Pigeon Post is the sixth novel in the Swallows and Amazons series that follows the adventures of Walker siblings (Swallows) and Blackett sisters (Amazons). The Swallows, Amazons and Ds are camping in the Blackett family's garden at Beckfoot. Their vessel Swallow is not available for sailing. James Turner (Captain Flint) has sent word that he is returning from an expedition to South America prospecting for gold. Slater Bob, an old slate miner, tells them a story about a lost gold vein in the fells. As Captain Flint has been unsuccessful in his prospecting trip, the children plan to prospect for gold on High Topps instead, as a surprise for Flint. They eventually find a spring by dowsing, and they move closer to the Topps. They send daily messages home by pigeon.
