▁of ▁the ▁national ▁cost ume ▁ ▁Although ▁the ▁traditional ▁cost ume ▁went ▁out ▁of ▁common ▁use ▁by ▁the ▁middle ▁of ▁the ▁ 1 9 th ▁century ▁it ▁was ▁still ▁worn ▁by ▁some ▁women ▁at ▁market ▁and ▁for ▁special ▁events . ▁There ▁were ▁calls ▁for ▁Wel sh ▁cost ume ▁to ▁be ▁rev ived ▁and ▁used ▁at ▁major ▁national ▁events , ▁especially ▁Royal ▁vis its . ▁In ▁ 1 8 3 4 , ▁August a ▁Hall ▁wrote ▁a ▁prize - win ning ▁ess ay ▁for ▁the ▁Mon mouth shire ▁and ▁G lam org ans hire ▁e isted df od ▁held ▁in ▁Card iff ▁but ▁this ▁contains ▁very ▁little ▁about ▁cost ume , ▁and ▁nothing ▁about ▁National ▁cost umes . ▁In ▁the ▁ 1 8 4 0 s ▁Hall ▁organ ised ▁balls ▁at ▁which ▁her ▁friends ▁wore ▁cost umes ▁based ▁on ▁the ▁set ▁of ▁fashion ▁pl ates ▁which ▁she ▁may ▁have ▁commission ed , ▁but ▁they ▁were ▁made ▁of ▁sat ins , ▁not ▁w ool ▁▁ ▁The ▁ad option ▁of ▁the ▁cost ume ▁coinc ided ▁with ▁the ▁growth ▁of ▁Wel sh ▁National ism , ▁where ▁the ▁industrial isation ▁of ▁much ▁of ▁south ▁G lam organ ▁was ▁seen ▁as ▁a ▁threat ▁to ▁a ▁traditional ▁agricult ural ▁way ▁of ▁life . ▁The ▁national ▁cost ume ▁made ▁from ▁Wel sh ▁w ool ▁was ▁therefore ▁seen ▁as ▁a ▁visual ▁declaration ▁of ▁a ▁Wel sh ▁identity . ▁During ▁an ▁ 1 8 8 1 ▁visit ▁by ▁the ▁Prince ▁of ▁Wales ▁to ▁Sw anse a , ▁the ▁Wel sh ▁cost ume ▁was