Don
Cant help you with traditional songs beyond what has been mentioned but I have written three songs about the Colne Valley - I live in Longwood- the other end of the Valley from Meltham and most ofr my songs have a 'traditional'feel

One is called the Golcar Lily - which is about another village just up the road from Meltham on the other side of the Colne River and is about the history of the pub there called the Golcar Lily

Another is called Prospect's Old Lady and is about the growth and demise of the mills in the Colne Valley

The third is called Scars of Blue and is about the demise of the Coal pits in the Huddersfield area it mentions Linfit Pit which is the pit between Meltham and Slaithwaite as well as Rowley Pit which is another pit in that area but not exactly sure where.

If you are interested and want to e-mail me Longwood4@aol.com I will send you the lyrics

sue