The office of a bridge is prolific of metaphor, whereof an amusing instance is Boswell's comparison of himself, when translating Paoli's talk to Dr. Johnson, to a "narrow isthmus connecting two continents." It has been aptly said of Dante's great poem, that, in the world of letters, it is a mediæval bridge over that vast chasm which divides classical from modern times. All concliating authors bridge select severed intelligences, and even national feeling: as Irving's writings brought more near to each other the alienated sympathies of England and America, and Carlyle made a trysting-place for British and German thought; as Sydney Smith's talk threw a suspension-bridge from Conservative to Reformer, and Lord Bacon's (in the hour of bitter alienation between Crown and Commons) "reconciling genius spanned the dividing stream of party."
How isolated and bewildered are villagers, when, after a tempest, the news spreads that a freshet has carried away the bridge! Every time we shake hands, we make a human bridge of courtesy or love; and that was a graceful fancy of one of our ingenious writers to give expression to his thoughts in "Letters from under a Bridge." With an eye and an ear for Nature's poetry, the gleam of lamps from a bridge, the figures that pass and repass thereon, the rush and the lull of waters beneath, the perspective of the arch, the weather-stains on the parapet, the sunshine and the cloud-shadows around, are phases and sounds fraught with meaning and mystery.
It is an acknowledged truth in the philosophy of Art, that Beauty is the handmaid of Use; and as the grace of the swan and the horse results from a conformation whose rationale is movement, so the pillar that supports the roof, and the arch that spans the current, by their serviceable fitness, wed grace of form to wise utility. The laws of architecture illustrate this principle copiously; but in no single and familiar product of human skill is it more striking than in bridges; if lightness, symmetry, elegance, proportion charm the ideal sense, not less are the economy and adaptation of the structure impressive to the eye of science. Perhaps the ideas of use and beauty, of convenience and taste, in no instance, coalesce more obviously; and therefore, of all human inventions, the bridge lends the most undisputed charm to the landscape. It is one of those symbols of humanity which spring from and are not grafted upon Nature; it proclaims her affinity with man, and links her spontaneous benefits with his invention and his needs; it seems to celebrate the stream over which it rises, and to wed the wayward waters to the order and the mystery of life. There is no hint of superfluity or impertinence in a bridge; it blends with the wildest and the most cultivated scene with singular aptitude, and is a feature of both rural and metropolitan landscape that strikes the mind as essential. The most usual form has its counterpart in those rocky arches which flood and fire have excavated or penned up in many picturesque regions,—the segments of caverns, or the ribs of strata,—so that, without the instinctive suggestion of the mind itself, Nature furnishes complete models of a bridge whereon neither Art nor Science can improve. Herein the most advanced and the most rude peoples own a common skill; bridges, of some kind, and all adapted to their respective countries, being the familiar invention of savage necessity and architectural genius. The explorer finds them in Africa as well as the artist in Rome; swung, like huge hammocks of ox-hide, over the rapid streams of South America; spanning in fragile cane-platforms the gorges of the Andes; crossing vast chasms of the Alleghanies with the slender iron viaduct of the American railways; and jutting, a crumbling segment of the ancient world, over the yellow Tiber: as familiar on the Chinese tea-caddy as on Canaletto's canvas; as traditional a local feature of London as of Florence; as significant of the onward march of civilization in Wales to-day as in Liguria during the Middle Ages. Where men dwell and wander, and water flows, these beautiful and enduring, or curious and casual expedients are found, as memorable triumphs of architecture, crowned with historical associations, or as primitive inventions that unconsciously mark the first faltering steps of humanity in the course of empire: for, on this continent, where the French missionary crossed the narrow log supported by his Indian convert in the midst of a wilderness, massive stone arches shadow broad streams that flow through populous cities; and the history of civilization may be traced from the loose stones whereon the lone settler fords the water-course, to such grand, graceful, and permanent monuments of human prosperity as the elaborate and ancient stone bridges of European capitals.
When we look forth upon a grand or lovely scene of Nature,—mountain, river, meadow, and forest,—what a fine central object, what an harmonious artificial feature of the picture, is a bridge, whether rustic and simple, a mere rude passage-way over a brook, or a curve of gray stone throwing broad shadows upon the bright surface of a river! Nor less effective is the same object amid the crowded walls, spires, streets, and chimney-stacks of a city. There the bridge is the least conventional structure, the suggestive point, the favorite locality; it seems to reunite the working-day world with the freedom of Nature; it is perhaps the one spot in the dense array of edifices and thoroughfares which "gives us pause." There, if anywhere, our gaze and our feet linger; people have a relief against the sky, as they pass over it; artists look patiently thither; lovers, the sad, the humorous, and the meditative, stop there to observe and to muse; they lean over the parapet and watch the flowing tide; they look thence around as from a pleasant vantage-ground. The bridge, in populous old towns, is the rendezvous, the familiar landmark, the traditional nucleus of the place, and perhaps the only picturesque framework in all those marts and homes, more free, open, and suggestive of a common lot than temple, square, or palace; for there pass and repass noble and peasant, regal equipage and humble caravan; children plead to stay, and veterans moralize there; the privileged beggar finds a standing-place for charity to bless; a shrine hallows or a sentry guards, history consecrates or Art glorifies, and trade, pleasure, or battle, perchance, lends to it the spell of fame. Let any one recall his sojourn in a foreign city, and conjure to his mind's eye the scenes, and prominent to his fancy, distinct to his memory, will be the bridge. He will think of Florence as intersected by the Arno, and with the very name of that river reappears the peerless grace of the Ponte Santa Trinità with its moss-grown escutcheons and aërial curves; the Pont Neuf, at Paris, with its soldiers and priests, its boot-blacks and grisettes, the gay streets on one side and the studious quarter on the other, typifies and concentrates for him the associations of the French capital; and what a complete symbol of Venice—its canals, its marbles, its mysterious polity, its romance of glory and woe—is a good photograph of the Bridge of Sighs!
The history of Rome is written on her bridges. The Ponte Rotto is Art's favorite trophy of her decay; two-thirds of it has disappeared; and the last Pope has ineffectively repaired it, by a platform sustained by iron wire: yet who that has stood thereon in the sunset, and looked from the dome of St. Peter's to the islands projected at that hour so distinctly from the river's surface, glanced along the flushed dwellings upon its bank, with their intervals of green terraces, or gazed, in the other direction, upon the Cloaca of Tarquin, Vesta's dome, and the Aventine Hill, with its palaces, convents, vineyards, and gardens, has not felt that the Ponte Rotto was the most suggestive servatory in the Eternal City? The Ponte Molle brings back Constantine and his vision of the Cross; and the statues on Sant' Angelo mutely attest the vicissitudes of ecclesiastical eras.
England boasts no monument of her modern victories so impressive as the bridge named for the most memorable of them. The best view of Prague and its people is from the long series of stone arches which span the Moldau. The solitude and serenity of genius are rarely better realized than by musing of Klopstock and Gessner, Lavator and Zimmermann, on the Bridge of Rapperschwyl on the Lake of Zurich, where they dwelt and wrote or died. From the Bridge of St. Martin we have the first view of Mont Blanc. The Suspension Bridge at Niagara is an artificial wonder as great, in its degree, as the natural miracle of the mighty cataract which thunders forever at its side; while no triumph of inventive economy could more aptly lead the imaginative stranger into the picturesque beauties of Wales than the extraordinary tubular bridge across the Menai Strait. The aqueduct-bridge at Lisbon, the long causeway over Cayuga Lake in our own country, and the bridge over the Loire at Orléans are memorable in every traveller's retrospect.
But the economical and the artistic interest of bridges is often surpassed by their historical suggestions; almost every vocation and sentiment of humanity being intimately associated therewith. The Rialto at Venice and the Ponte Vecchio at Florence are identified with the financial enterprise of the one city and the goldsmith's skill of the other: one was long the Exchange of the "City of the Sea," and still revives the image of Shylock and the rendezvous of Antonio; while the other continues to represent mediæval trade in the quaint little shops of jewellers and lapidaries. One of the characteristic religious orders of that era is identified with the ancient bridge which crosses the Rhone at Avignon, erected by the "Brethren of the Bridge," a fraternity instituted in an age of anarchy expressly to protect travellers from the bandits, whose favorite place of attack was at the passage of rivers. The builder of the old London Bridge, Peter Colechurch, is believed to have been attached to this same order; he died in 1176, and was buried in a crypt of the little chapel on the second pier, according to the habit of the fraternity. For many years a market was held on this bridge; it was often the scene of war; it stayed the progress of Canute's fleet; at one time destroyed by fire, and at another carried away by ice; half ruined in one era by the bastard Faulconbridge, and, at another, the watchword of civil war, when the cry resounded, "Cade hath gotten Londonbridge," and Wat Tyler's rebels convened there; Elizabeth and her peerless courtiers have floated, in luxurious barges and splendid attire, by its old piers, and the heads of traitors rotted in the sun upon its venerable battlements. Only sixty years ago a portion of the original structure remained; it was once covered with houses; Peter the Dutchman's famous water-wheels plashed at its side; from the dark street and projecting gables noted tavern-signs vibrated in the wind. The exclusive thoroughfare from the city to Kent and Surrey, what ceremonial and scenes has it not witnessed,—royal entrances and greetings, rites under the low brown arches of the old chapel, revelry in the convenient hostels, traffic in the crowded mart, chimes from the quaint belfry, the tragic triumph of vindictive law in the gory heads upon spikes! The veritable and minute history of London Bridge would illustrate the civic and social annals of England; and romance could scarce invent a more effective background for the varied scenes and personages such a chronicle would exhibit than the dim local perspective, when, ere any bridge stood there, the ferryman's daughter founded with the tolls a House of Sisters, subsequently transformed into a college of priests. By a law of Nature, thus do the elements of civilization cluster around the place of transit; thus do the courses of the water indicate the direction and nucleus of emigration,—from the vast lakes and mighty rivers of America, whereby an immense continent is made available to human intercourse, and therefore to material unity, to the point where the Thames was earliest crossed and spanned. More special historical and social facts may be found attached to every old bridge. In war, especially, heroic achievement and desperate valor have often consecrated these narrow defiles and exclusive means of advance and retreat:—
"When the goodman mends his armor
And trims his helmet's plume,
When the good-wife's shuttle merrily
Goes flashing through the loom,
With weeping and with laughter
Still is the story told
How well Horatius kept the bridge
In the good old days of old."
The bridge of Darius spanned the Bosphorus,—of Xerxes, the Hellespont,—of Cæsar, the Rhine,—and of Trajan, the Danube; while the victorious march of Napoleon has left few traces so unexceptionably memorable as the massive causeways of the Simplon. Cicero arrested the bearer of letters to Catiline on the Pons Milonis, built in the time of Sylla on the ancient Via Flaminia; and by virtue of the blazing cross which he saw in the sky from the Ponte Molle the Christian emperor Constantine conquered Maxentius. The Pont du Gard near Nismes and the St. Esprit near Lyons were originally of Roman construction. During the war of freedom, so admirably described by our countryman, whereby rose the Dutch Republic, the Huguenots, at the siege of Valenciennes, we are told, "made forays upon the monasteries for the purpose of procuring supplies, and the broken statues of the dismantled churches were used to build a bridge across an arm of the river, which was called, in derision, the Bridge of Idols."