Dartmoor is the exposed, thinly settled landscape around Baskerville Hall and the principal outdoor setting of the investigation. Its apparent openness is misleading: scattered dwellings and concealed refuges are separated by hazardous ground, and knowledge of the terrain can determine whether a journey becomes a route, a pursuit, or a trap.

Regional Layout

A large-scale Ordnance map gives Sherlock Holmes a way to read the country before he travels through it. Baskerville Hall lies at the center of the district, with a wood around it and Yew Alley running beside the moor. Grimpen village, where Dr. Mortimer has his headquarters, is among the few clusters of buildings; within five miles of the Hall, the map shows only a handful of scattered dwellings. Lafter Hall is also marked, as are High Tor and Foulmire, two moorland farmhouses. Princetown is fourteen miles away. Between these isolated points stretches the desolate moor, making distance and sparse settlement central facts of the local geography.

The map also records the difference between seeing a place and understanding how to cross it. A broad northern plain, broken by strange hills, appears to offer good ground for a gallop. Stapleton warns Dr. Watson that the scattered bright-green patches are deceptive and that people have died after misjudging them. He says he can travel safely only by remembering complex landmarks, and strongly discourages Watson from attempting the route alone. The landscape’s dangers are therefore not always legible from a distance: familiarity, not simply a map or a clear view, governs safe passage.

Ground, Landmarks, and Shelter

The moor’s old stone huts provide both landmarks and possible concealment. After establishing that the watcher on the moor is likely to be among the huts on a hillside, Dr. Watson searches a circle of them. One hut retains enough of its roof to shelter someone from the weather, and a faint track among boulders leads to its opening. Watson finds the place empty, but the search establishes how the ruins can serve as a hiding place within an otherwise exposed landscape.

Other features likewise acquire practical importance through their position. From Black Tor, Watson looks across the downs toward Baskerville Hall, whose towers are visible beyond the trees. He finds no trace of the solitary figure previously seen there. On another night, Watson and Sir Henry Baskerville follow a small candle burning in a crevice between rocks. A boulder conceals their approach, while the candle is arranged so that its light can be seen from the direction of Baskerville Hall but not generally across the moor. In this setting, rocks, sightlines, and distance allow a small signal to connect the open moor to the house while keeping its source concealed.

Movement and Risk

Characters repeatedly cross the moor despite warnings about its dangers. Sir Henry insists that nothing will prevent him from going to the home of his family, and Dr. Watson agrees to accompany him. Later, Sir Henry leaves alone even though Dr. Watson has been instructed not to let him go unaccompanied. Watson sets out after him toward Stapleton’s home, aware that he may have failed in his responsibility to keep watch. The broad landscape permits movement, but its isolation makes separation consequential: a person who walks out of sight can quickly become difficult to protect or find.

The same difficulty shapes pursuit. In darkness, Dr. Watson and Sir Henry move toward the candle signal, unable to judge its distance reliably until they draw close. When Holmes and Watson later run across the moor toward sounds in the dark, they stumble against boulders and force their way through gorse, changing direction over rises and slopes without finding anyone. The landscape that appears empty from a hilltop becomes obstructed and disorienting at ground level, especially at night.

Weather and Narrative Significance

Weather intensifies the moor’s physical isolation. On October 17, rain falls through the day, and Dr. Watson observes that even the firm uplands are becoming difficult to cross. From Black Tor, he sees rain squalls and low cloud across the hills; Baskerville Hall’s towers and the prehistoric huts on the slopes are among the few visible signs of habitation. The following day, as the investigation turns toward its conclusion, Watson’s search among the stone huts brings the hidden and the visible into close proximity: the suspected refuge is identifiable, yet its occupant remains absent.

Fog over Grimpen Mire makes the landscape’s uncertainty especially immediate. A dense white bank drifts toward the observers, and Holmes watches its movement with impatience. The mire and the fog are not merely distant features of the setting: together they limit visibility and make the approach of danger difficult to assess. Across the investigation, Dartmoor’s empty expanses invite observation but frustrate certainty. Its scattered homes, deceptive ground, concealed shelters, and unstable conditions turn geography into an active constraint on travel, surveillance, and pursuit.