Princetown is presented chiefly through its great convict prison, a distant but consequential point on Sherlock Holmes’s map of the moor. Fourteen miles from the sparse settlements around Baskerville Hall, it links the isolated landscape to the authorities’ response to an escaped prisoner’s death.

Position on the Map

Holmes studies a large Ordnance map to understand the district in which the investigation unfolds. It places Baskerville Hall amid surrounding woodland and locates Grimpen village, where James Mortimer has his headquarters, within a five-mile radius containing only a few scattered dwellings. The map also marks Lafter Hall, a possible residence for Stapleton, and the moorland farmhouses High Tor and Foulmire. Princetown lies fourteen miles away, beyond these points, and is identified by its great convict prison. The map makes the prison part of the region’s geography without suggesting that it belongs to the close cluster of homes and landmarks around the Hall.

The Prison and the Escaped Convict

Princetown’s clearest connection to the plot is the escape of the convict pursued across the moor. The prison gives that fugitive’s presence a concrete point of origin, even as the surrounding wilderness allows him to hide beyond the settlement. The contrast is sharp: Princetown is associated with confinement, while the open moor offers concealment and makes pursuit difficult.

After the fugitive is found dead, Sherlock Holmes reports the death from Grimpen village to Princetown. The report links the remote investigation back to the prison and its authorities; Holmes adds that he expects the others will not be troubled in the matter. Princetown thus appears both at the beginning of the fugitive’s connection to the story, as the prison from which he escaped, and in the practical aftermath of his death.

The Surrounding Moor

The map situates Princetown against a landscape that resists easy movement. Across the moor, green patches that may look like fertile ground are dangerous: Stapleton warns that attempts to cross such country have cost lives, and says safe passage depends on remembering complex landmarks. The warning makes local knowledge a condition of survival, not merely a convenience.

Other episodes reinforce the danger and uncertainty of movement through this country. During a night pursuit, a single candle burns in a sheltered crevice of rock, visible in the direction of Baskerville Hall; Holmes and Sir Henry approach under cover of a boulder. Elsewhere, an old stone hut among the hills offers a possible hiding place, while dense fog over Grimpen Mire threatens to advance toward the observers. These scenes concern the wider moor rather than Princetown itself, but they show why the prison’s fourteen-mile separation matters: the distance lies across terrain that can conceal people, distort apparent distances, and obstruct travel.

Narrative Significance

Princetown is not developed as a setting for action in the supplied account; its significance comes from its position on Holmes’s map and its institutional connection to the escaped convict. Against the moor’s scattered farms, hidden shelters, and hazardous ground, the prison stands for the ordered world beyond the pursuit. Holmes’s report carries news of the death across that divide, giving a remote event an administrative consequence and closing the fugitive’s link to the place from which he escaped.