PONT FLAVIEN at Saint-Chamas, Roman bridge, 176-7. PONT NAPOLÉON, a great modern bridge, 278. PONT NEUF, Paris, 321-2, and the illustration. PONT NOTRE DAME, Paris, 225. PONT ST. BÉNÉZET at Avignon, frontispiece, 81-4, 217, 236-9, 262, 297. PONT ST. CLOUD, 296. PONT ST. ESPRIT, 92, 126, 296 _et seq._ PONT ST. MICHEL at Paris, 225. PONT VALENTRÉ at Cahors, 263-4, 282-5. PONT-Y-MYNACH, the Devil’s Bridge near Aberystwyth, 67 _et seq._ PONT-Y-PANT, 131. PONT-Y-PRYDD, 28 _footnote_. PONTE AUGUSTUS at Rimini, 199. PONTE CARTARO at Ascoli-Piceno, 201. PONTE CECCO at Ascoli-Piceno, 201. PONTE DELLA TRINITÀ at Florence, 222, 316. PONTE DI PORTA CAPPUCINA at Ascoli-Piceno, 201. PONTE MAGGIORE at Ascoli-Piceno, 200. PONTE MOLLE, 197. PONTE NOMENTANO, 298-9; also the picture facing page 296. PONTE QUATTRO CAPI, 196. PONTE ROTTO, 23, 192. PONTE S. BARTOLOMMEO, 196. PONTE SALARO, 191. PONTE SANT’ ANGELO, 194-5, 324. PONTE SISTO, 197, 265. PONTE VECCHIO, 210, 222. PONTISM, the historical study of bridges. PONTIST, a devotee of bridges and their history. PONTIST Brothers or Friars, or Frères Pontifes, 83, 90, 91, 92, 296, 297, 342. St. Bénézet was one of the leaders in this religious brotherhood of good craftsmen. PORTA DELL’ ARCO at Arpino, celebrated in the history of pointed arches, 156-7. PORTAGE BRIDGE, GREAT, on the Genesee River, 353-4. PORTER, SIMON, bailiff at Old Shoreham in the year 1318; his official defence of the neglected timber bridge, 41-2. POSTBRIDGE, Dartmoor, its famous clapper bridge, 104. PRATT, GODFREY, nefarious guardian of Old Bow Bridge, 98-9. PREHISTORIC BRIDGES, and their descent from Nature’s models, see Chapters I and II. PRESTON BRIDGE, 250 _footnote_. PRIOR PARK, Palladian Bridge, 343. PROGRESS IN HUMAN SOCIETIES, its terrible slowness, 39, and section iii, Chapter I, “Custom and Convention,” 53-84; see also 110, 333. PUENTE DE SAN MARTIN at Toledo, 287-8. PUENTE LA REINA, 27 _footnote_. PUENTE NUEVO at Ronda, 280, and _footnote_. PUENTE TRAJAN over the Tagus at Alcántara, 6, 153, 183, 186, 212, 321. PUL-I-KAISAR at Shushter in Persia, 202-4. PUL-I-KÂREDJ in Persia, 265-6. PUL-I-KHAJU at Isfahan, 212-16. PUL-I-MARNUN at Isfahan, 212; see also “Persian Bridges” and “Ali Verdi Khan.” PULISANGAN, China, 310-12. PULTENEY, WILLIAM, his bridge at Bath, 221. PURITANS, their enmity to chapelled bridges and to wayside shrines, 230, 233 _et seq._ PYRENEES, FRENCH, great bridges there, 278-80. QUAKERS, their attitude to the strife that bridges and roads circulate, 35-6. QUALITIES OF A GREAT BRIDGE, 320. QUICKSANDS OF CHEAPNESS, 48. RABOT, THE, at Ghent, a fortified bridge and lock, 289, 291.