You can find explanations and methods in;
Treading the Mill by Nigel G. Pearson
Call of the Horned Piper by Nigel Jackson
A Grimoire for Modern Cunning Folk by Peter Paddon
Traditional Witchcraft: A Cornish Book of Ways by Gemma Gary
Liber Nox by Michael Howard
Also Sarah Lawless has some blog posts at;
Also feel free to message me if you want to discuss.