Yorkshire English in Georgette Heyer's The Unknown Ajax

Here's the abstract:

This article analyzes Georgette Heyer’s use of Yorkshire English in her novel The Unknown Ajax to determine how accurately Heyer represented Yorkshire English. The author discusses research that has been performed on other writers’ usage of nonstandard speech before looking at the lexical and phonological use of Heyer. Based on the results of the study, the author believes Heyer did accurately represent Yorkshire English in her novel and acknowledges that further research may be done to improve the study.