An important timber bridge with stone piers belongs to a handicraft more advanced than that in the bridges of Bhutan; it comes between the primitive inspiration of the Bhutan carpenters and the simplest arched bridges with plain gateway towers. It has not yet vanished from Europe, for a Gothic example exists at Thouars, in Deux-Sèvres, France, according to a photograph sold by Neurdein, of Paris. Another example crosses the Guadalaviar above Albarracin, in Aragon; and let us remember also that the tree bridge resting on stone piers has influenced some metal viaducts, such as Runcorn Bridge, near Liverpool, dating from 1868. In principle the construction is the same, timber being displaced by metal. At the end of its approach arches, where the metalwork begins, Runcorn Bridge has two gateways, each with twin turrets, and a great display of battlements and of machicolations. Although this make-believe of war has a farcical bad taste, like the assumed erudition that keeps dummy books in a library, yet Runcorn Bridge has a well-defined interest: it mimics a phase of military architecture which was evolved from such carpentry as to-day we find in Bhutan. [Illustration: DEFENSIVE BRIDGE AT SOSPEL] 2. Gateway Bridge at Sospel, in the Italy of France. This drawing illustrates very well the transition from the primitive bridges of Bhutan to a simple arched bridge guarded by a gatehouse of control. It is a poor little house, its architecture being less intelligent than that in the Bhutan gateway towers. In these there is cleverness enough to prove that the bridge represents a stale old custom which has lagged behind the advance of handicraft, whereas the bridge at Sospel is far in advance of the tawdry little gatehouse. A span separates the gatehouse from the town, and the roadway is not on the same level above both arches. [Illustration: AT NARNI IN ITALY: THIRTEENTH CENTURY] 3. A Broken War-Bridge of the Thirteenth Century, Repaired with Timber. A very valuable illustration, and for several reasons. The gatehouse with its pointed archway is unusually tall; and the machicolated box below the slightly gabled roof is unique in my experience. The holes above this defensive work are partly for ventilation and partly for crossbowmen, whose fire would “puncture” an attack on the right entrance of the bridge. There is but one arrow-hole on the first storey, and I should not care to shoot through it while molten lead or boiling oil came sizzling down in two streams from that machicolated box. I do not know why the gate-tower was made so very high, but suppose that its engineer wished to build a place of vantage from which the movements of an attack could be seen afar off, beyond the entrance gates. In any case it failed to save four of the arches from gunpowder wars; and note the restoration! Could anything speak to us more clearly of the primitive bridge with stone piers united by rough timbering?