childrens book question

[janaol]

Who were the whitby red devils? (3,7) letters.

[Ray The Grey]

Here is a review of a book by Theresa Tomlinson- they seem to be rouge men or polishers ?

In the dramatically named Night of the Red Devil, dream becomes reality as Sam learns more about Whitby jet, red devils (rouge men, polishers) and jettie lads. A piece of jet takes him back in time to an attic workshop, and the Whitby landslip of 1870. As in the other two Time-Slip Adventures, objects survive in the present to corroborate experiences

Hope this helps