Definition of "thur"

“Thur’s a lot of Indians down thur, Captain Scull,” one says.

2007 November 11, Virginia Heffernan, “High-Def at High Noon”, in New York Times‎

"I'd 'ave sooner had 'un of anybody else," said he, "but thur war nur anuther to be had, and it bean't such a bad 'un nither, only Measter Humphreys be hardish in the mouth."

1898, Richard Jefferies, The Toilers of the Field‎

Any-rate, thur wur lots of talk, fur 'twas seed not only in the church, and churchyard, but up at the house."

1905, Joseph Hocking, Roger Trewinion‎