if you want a detailed look at the marcher, borderland lordships.. the mortimer history society has books north west ,south west and south east.... even their own youtube channel... the first earl of march, roger mortimer was the great grandson of prince llewellyn the great..., this complicates everything,, as the house of york, ancestress ann mortimer... was also a descendant..., yes wales has many many castles... and even some not cared by cadw, on private land.., or even those long demolished or gone... there is a great new channel looking at some of the detailed history @Little Knowledge Podcast
