Penrhyn Castle, [209]
Pentillie Castle, [58]
Perddyn, The, [171]
Peterloo massacre, [250]
Petteril, The, and Greystoke Castle, [307]
Pillar Mountain, [297]
Plinlimmon, source of five rivers, [82], [124];
legendary associations, [125], [126]
Plym, The:
Rise and outlet, [49];