The dimensions given by M. Pingeron may be accurate; they represent a hugely magnified clapper bridge decorated with sculpture and carried on tall piers for a distance of 4400 metres, in a series of three hundred spans. The marble lions, I suppose, ornament the parapets above the piers, like those on the bridge of Pulisangan (p. 310). Marco Polo visited the province of Fo-Kien, where Loyang Bridge is said to be, and stayed at the city of Kue-lin-fu, known to-day as Kien-ning-fu. Here he was greatly struck by “three very handsome bridges, upwards of a hundred paces in length, and eight paces in width.”[42] Not a vivid description, yet enough to prove that notable bridges in Fo-Kien have had a long history. IV TREE-BRIDGES WITH STONE PIERS The most famous bridge in this kind is the one built by Trajan over the Danube, just below the rapids of the Iron Gate. Trajan required it for his wars against Dacia, which in A.D. 106 he brought to a successful end, the Dacian leader Decebalus being slain and his people subdued. The bridge had played its part, yet Hadrian, the next Emperor, who began his reign ten years afterwards, looked upon it as a dangerous highway, open to incursions from Dacian revolts, and for this reason he destroyed some piers and the footway. Perhaps Hadrian was jealous of Trajan’s work, for two fortified gates and a handful of Roman troops could have defended the bridge against barbarians. There has been much controversy over this great structure. Its architect was Apollodorus of Damascus, who designed also the Trajan column placed in the centre of the Forum Trajanum. A bas-relief on this column represents the bridge, but in a manner at odds with the written description given by Dion Cassius, who held important offices under Commodus, Caracalla, and Alexander Severus, A.D. 180-229. Dion Cassius wrote a history of Rome, in eighty books, and a small portion of this work has come down to us entire. His evidence then is worth having, and it states that the bridge had twenty piers of hewn stone, 150 feet high and 60 feet wide, with openings between them of 170 feet, spanned by arches. Doubt has been thrown on the accuracy of this description, because the bridge on the Trajan column is unsuited to a span of 170 feet; “nevertheless thirteen piers are still visible out of the twenty, according to Murray’s ‘Handbook.’ The writer has not been able to find any accurate measurement of the width between these piers, but as the ‘Handbook’ speaks of the length of the bridge as perhaps 3900 feet, and as the Conte Marsigli, writing from personal observation, in a letter to Montfaucon, gives the total length as probably 3010 feet, there can be no doubt that the spans were very considerable and that the representation of the design in the bas-belief is almost wholly conventional. The one point as to which it gives clear information, not