FIELD FILE · TOMMYKNOCKERSHUMANOIDFOLKLORE

Tommyknockers

Also known as Tommy Knockers, Knockers, Knackers

Little mine spirits brought from Cornwall to the American West, said to knock in Colorado’s gold and silver mines – warning, teasing or guiding the miners.

Tommyknockers are the little people of the mines. In the hard-rock gold and silver camps of Colorado, Nevada and California, miners spoke of tiny, whiskered figures dressed like miners themselves, who lived deep underground and announced their presence with knocking in the rock. They could be helpful or mischievous: one moment hiding a pick or snuffing out a candle, the next tapping out the location of a rich vein – or hammering a warning before the roof came down.

The belief came from Britain. Cornish and Devon miners had long told of “knockers,” small spirits of the tin and copper mines, and Welsh miners had similar beings called coblynau. When Cornish miners – nicknamed “Cousin Jacks” – emigrated in large numbers in the 19th century, first to the coal and iron districts of Pennsylvania and later to the mining booms of the West, they carried the knockers with them. In America the name became “tommyknockers,” and the tradition spread to miners of every background.

Colorado’s Front Range mining districts, from Central City and Black Hawk to Idaho Springs, were full of Cornish miners in the gold and silver rush years, and the tommyknocker became part of local mining culture. Miners left the last crust of a pasty or a bite of lunch as an offering, and some Cousin Jacks reportedly refused to enter a new mine until they were assured the knockers were already at work. Historians at History Colorado note that the stories also helped pass the time in an era of grueling, dangerous work and little entertainment.

Folklorist Ronald M. James has traced how the knockers changed in America, becoming more ghostly – sometimes the spirits of dead miners – and more closely tied to safety as independent mining gave way to big industrial operations. The belief lasted well into the 20th century: according to a widely repeated account, when a large mine was sealed in 1956, descendants of Cornish miners petitioned the owners to let the tommyknockers out so they could move on to other mines, and the owners obliged.

Type

Humanoid

Status

Folklore

First reported

1820s

Best-known location

Gold and silver mines of Colorado’s Front Range, around Idaho Springs and Central City

Also called

Tommy Knockers, Knockers, Knackers

Reported in

California Colorado Nevada Pennsylvania England

What witnesses describe

Small, about two feet tall, gnome-like figures with large heads, long arms, wrinkled skin and white whiskers, wearing miniature miner’s clothing. They are usually heard rather than seen – as tapping or knocking deep in the rock.

Where and when it’s seen

Underground hard-rock mines – shafts, drifts and tunnels – in Colorado’s mining districts (Central City, Black Hawk, Idaho Springs and beyond), and in the mining regions of Nevada, California and Pennsylvania; originally the tin mines of Cornwall and Devon.

Notable sightings

1. 1820sKnockers cross the Atlantic Western Pennsylvania

   Welsh and Cornish immigrant miners brought stories of knockers – their warning taps and their thefts of unattended tools and food – to Pennsylvania’s mines.

2. 1859 onwardThe Colorado gold rush Central City and Idaho Springs, Colorado

   Gold strikes in the mountains west of Denver drew experienced Cornish hard-rock miners, and with them the tommyknocker tradition took root in Colorado’s mines.

3. 1956Setting the knockers free American West

   When a large mine closed and its entrance was sealed, Cousin Jack descendants are said to have petitioned the owners to release the tommyknockers so they could find new mines – and the owners agreed. The account is folklore and the details vary.

4. 1992A folklorist traces the knockers Western Folklore (journal)

   Ronald M. James’s article “Knockers, Knackers, and Ghosts: Immigrant Folklore in the Western Mines” examined how the Cornish belief changed in the American West.

What could explain it?

• Knocking and creaking underground has natural causes: shifting rock, settling timbers, water, and the sound of other crews drilling and blasting in nearby workings.
• Belief in protective mine spirits gave miners a way to make sense of sudden, deadly dangers, and warning knocks may have reflected real early signs of a cave-in.
• The tradition is an immigrant folk belief carried from Cornwall, Devon and Wales, not reports of an unknown animal.

Legend, culture and tourism

Tommyknockers remain part of Colorado’s mining heritage: the Tommyknocker Brewery & Pub in Idaho Springs, open since 1994, takes its name from them, and mine tours in the area tell their stories. They also inspired Stephen King’s 1987 novel The Tommyknockers, and appear in works from Wallace Stegner’s Angle of Repose to the Hardy Boys.

Places to visit

Where it’s reported

California Colorado Nevada Pennsylvania England

Tommyknockers in the news

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First published October 13, 2026 · Updated October 14, 2026