I'm reading Giles Tremlett's biography of Catherine of Aragon at the moment in which he states the following (when she went to join Prince Arthur, her then husband, at Ludlow Castle, where he oversaw the Welsh Marches):

"If Catherine knew anything at all about the Welsh before she arrived in Ludlow, it would have been what Ayala had written to her parents a few years before she set sail. He warned that the Welsh were renowned fortune-tellers. He drew comparisons with Spain's own, supposedly Celtic, north-western region of Galicia. 'You must know that there are many in the province of Wales who tell the future as they do in Galicia when they read a man's back, while here they read various other things and have their own practices.' The English were also very superstitious. 'They follow prophecies, affirming that they are true,' he reported. Catherine may have known that her own father-in-law turned to a Welsh priest, famed for foretelling the deaths of previous English kings, when he wanted to divine his own future."

updated by @gaynor-madoc-leonard: 11/11/15 10:37:47PM