. . . . . "Trevithick's Penydarren Locomotive" . . . "Penydarren" . . "Penydarren Ironworks" . "Pen-y-Darren Ironworks" . "Penydarren power station" . "Penydarren ironworks" . . . "Penydarren or Merthyr" . . . "Penydarren Ironworks" . . .