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Children won't behave? Scare them into obedience by threatening a visit from one of these bogeymen.
It might sound cruel today but it's what many a parent of yesteryear did when little Jonas and Molly (popular 18th-century names) wouldn't come in for their tea. That's what the legends of some of these mythical creatures were used for.
Some come from ancient folklore and share much in common with the legendary monsters of other civilisations the world over. Some are even the subjects of alleged 'sightings'.
Few rational people today believe in them but in the days before mass education and science it wasn't just children that quaked at the prospect of encountering these supernatural beings.
Indeed some places take their names from these sinister beings such was their cultural impact.
Here are eight of Yorkshire's best known mythical monsters.
(Image: Vasilios Markousis)
The legend of this oversized, black dog with huge teeth and claws is known across Yorkshire and the North East.
The places with which this ferocious, canine-like creature is associated include Troller's Gill, in the Dales, the centre of York, where he hunts lone travellers in alleyways; and a wasteland between Wreghorn and Headingley Hill, in Leeds. In Wakefield, he's known as 'Padfoot'.
(Image: Flickr/Julian Povey)
Hobgoblins, despite their unsettling appearance, were a benevolent bunch. These small, hairy, cave-dwelling elves, were happy to do your household chores or farm work in exchange for a jug of fresh cream. Every Yorkshire dale was said to have its own 'hob' or 'dobby'.
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A boggart, however, was an evil version of a hob, capable of souring cream, laming a farm animal or even making children disappear.
Such was the impact of their legend that an area in Leeds is called Boggart Hill and a collection of potholes in Clapham, Yorkshire Dales, is called Boggarts Roaring Holes due to the angry boggart growls said to emanate from them.
This giant, who carries a spiked club, is said to haunt Yorkshire's loneliest roads. He is covered in chains and the heads of his victim so he's probably not the first person you'd want to meet on a leisurely bike ride across the moors.
Apparently he likes spooking travellers by jumping out at them which means this 13ft ogre must be an expert at hide and seek.
Mulgrave Woods where Jeanie of Biggersdale is supposed to live
Jeanie is a bad-tempered fairy who lives in Hob's Cave in Mulgrave Woods, near Whitby. She's not too keen on visitors and casts curses on people who stop by.
So the story goes, a drunk farmer from Eskdale decided to pay her a visit and entered the woods on horseback shouting her name. He freaked out when she answered and galloped off but Jeanie followed. The farmer lept over a stream – knowing otherworldly beings couldn't cross water – and escaped.
The horse wasn't so lucky and Jeanie cast a spell splitting the horse in two which seems a bit excessive.
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A Mermaid by John William Waterhouse (1849-1917)
(Image: Royal Academy of Art)
These beautiful sirens became caught in a storm and ended up washed up on the beach at Staithes. They were imprisoned and mistreated by the townsfolk although some were more sympathetic and brought them food.
The village eventually warmed to them and took them to a beach party – only for the mermaids to escape to the sea. As they fled, the villagers threw stones at them. The mermaids cast a curse saying the sea would flow to Jackdaws' Well, which at the time was some way inland prompting mocking laughs from the villagers.
Sure enough, coastal erosion began to eat away at the village and during one storm, 13 people died and Jackdaws' Well was lost.
A carving of Mother Shipton at the Knaresborough cave which bears her name
Born Ursula Southeil, around 1488, Mother Shipton was said to have been born at a cave in Knaresborough which now bears her name.
The soothsayer and prophetess, reputed to be frightful in appearance, is said to have made a number of predictions associated with great disasters in Britain, the US and Australia in the 17th, 18th and 19th centuries.
Today, Mother Shipton's Cave is a popular tourist destination.
(Image: Flickr/James Finister)
Not a strong cheese but a werewolf with exceptionally bad breath. This half-man, half-lupine is reputed to stalk the Yorkshire Wolds.
There have been several 'sightings' of Old Stinker around Barmston Drain, a drainage stream for the River Hull. One time, Old Stinker was spotted eating a German Shepherd dog and leaping an 8ft fence with his prey clamped in his jaws.
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Stray too close to the water and Peg Powler will get you
This water spirit is said to live in the River Tees, which divides Yorkshire and County Durham.
Peg, similar to the equally malignant water monsters Grindylow, grabs children who stand too close to the water, drags them under and devours them.
One guesses that parents, who wanted to keep their kids safe on riverside walks, mentioned her to stop their little ones getting too close to the water.