And, speaking of Concertos, we must not forget the one for the violin, which surely ranks only after that by Beethoven, and is attempted by all the violinists. Its charm is never failing. The fine intensity of the impassioned Allegro has something feminine and far reaching in its quality, so that it was a rare pleasure to hear it interpreted by such an artist as Camilla Urso, with such true nervous grasp and accent. The middle movement seemed divine; and the finale, heralded by the brass ff, is so uncontainable and full of fire, so brilliant and impetuous, that it admits of being taken at the most rapid tempo. It is perhaps the most popular of all violin concertos.

All the great masters have written string quartets. The Quartet for two violins, viola and 'cello, corresponding to the four essential parts in harmony, each maintaining its individuality, yet each essential to the whole, is the quintessence of musical expression. Any imperfection betrays itself inevitably; all is exposed; there is nothing hidden under an orchestral coloring or vague passages of mere effect. The four voices are four persons. Not to speak of Haydn, father and founder of the race, the greatest models are those of Mozart and Beethoven. Those of Beethoven often seem like foreshadowings in outline of later phases in his larger grand creations. Those of Mendelssohn are less purely quartet-like. They have more of a singing quality,—a melody with an accompaniment,—and seem to seek orchestral development. The early one in E flat is of highly impassioned character, and might be distinguished as the Quartet Pathetique. It has a pathetic introductory Adagio, followed by a passionate Allegro; then a Canzonetta, a quaint minor strain in the spirit of some sad old Volkslied or Ballad; then an Andante of profoundest melancholy; then a bold finale, in 12-8, running in very rapid triplets. The three Quartets of Op. 44 are in a riper style. But the first begins with a swift and fiery Allegro, of which the theme is strikingly symphonic, and which has been well said to be not quartet-writing at all, but a melody with a bass and a mere filling-in of middle parts; not a conversation between four distinct individualities. The Mendelssohnian ardor, depth of feeling, yearning aspiration, with all his grace, facility, and clearness, pervade these quartets; but more perfect as quartets are his part-songs for mixed and for male voices. His last quartet, in F minor, written just after the death of his beloved sister Fanny, so soon before his own, has spontaneous unity in all its movements. It is said to have been written in forty-eight hours, in one close closeting with grief.

Of the two Quintets, that in A, of the juvenile period, is fresh, bright, full of life and charm, having a lovely Andante Intermezzo, and an elfin Scherzo. The much later one, in B flat, by the irrepressible and soaring impetus of its Allegro vivace,—challenge bravely answered in the finale,—by the sad ballad-like Andante scherzando in D minor; and by its profoundly, grandly beautiful Adagio, is perhaps more popular and always welcomed with sincere delight.

There remains the Octet, written just before the Midsummer Night's Dream. It is not a double quartet, two quartets reinforcing or offsetting one another; but it is a conference of eight real parts, eight individualities. The ensemble, especially the fiery opening Allegro, has the richness and fullness of an organ's diapasons, and naturally abounds in contrapuntal imitation to keep eight such parts employed. It is laid out on the broad scale of a symphony, with great contrast between its several movements, especially between the airy-light, crisp staccato of its Scherzo (forerunner of the fairy overture) and the grand sweep and rush, like a freshet, of the Presto finale. The work bears performance by all the strings of an orchestra, and is not seldom so presented.

We come now to his poetic, fascinating Concert Overtures, already ushered in by Shakespeare's fairy wand. Three of these date shortly after the Midsummer Night's Dream. The finest of them is the first, scored in Rome a year or two after his visit to the Hebrides, the outgrowth of an attempt to convey to his sister Fanny, in a piano sketch, his impressions of the "lonely island." The overture is often called "Fingal's Cave." It does not deal in literal description. It is not realistic. It is the feeling of the scene, subjectively conceived. The leading theme (B minor) suggests the dreamy reverie of one leaning over the water, absorbed in its commingling, fluctuating, mystic ebb and flow. The same poetic spirit sang the Gondellieder. In the strong answering motive you feel the wild force of the waves dashing on the rock-bound shores; loud calls give the sense of distance; you hear cries of sea-birds; while all bespeaks the watery atmosphere, the solemn silence and the mystic solitude of ocean.

Then came Meeresstille und Glückliche Fahrt,—a reproduction as Overture of two sea-pictures from two little poems of Goethe; the first conveying the sensation of a dead calm at sea; then the rising of a breeze, the boatswain's whistle, the setting of sails and swinging round of the huge, heavy hulk, the addressing itself to motion, making smooth, gallant headway (with ever and anon great, deep, mysterious sighs!) and entering port amid a triumphal blaze of trumpets. It is a wonderfully graphic and imaginative reproduction of the subjects. The instrumentation is as telling and artistic as the thematic working. The introduction of the piccolo and of the deep serpent and contrafagotto conveys a sense of illimitable height and depth.

The third, to "the Fair Melusina," Felix tells his sister, he wrote for an opera of Conradin Kreutzer's, based on Tieck's Mährchen, which he saw at a theatre. He disliked Kreutzer's music, especially the Overture, which was encored, and he resolved to write another "which the people might not encore, but which would cause them more solid pleasure." It is romantic music in the fullest sense. In the two contrasted themes,—the first (in F) watery, cool and rippling, tempting one beneath the waves,—the other (F minor) chivalric, heroic, proud, impatient,—he clearly had in view the princess Melusina (supposed to be a mermaid in the hours denied to her lord), and the brave knight who weds her. Schumann says it revives "those fables of the life deep down beneath the watery abyss." How bright and beautiful the mingling colors of the instruments! With what fine contrapuntal unity in variety the imitation and development proceeds!

More to the humor of to-day, perhaps, is his much later powerfully dramatic Overture to Ruy Blas. It is exciting, with bold contrasts, fraught with impending tragic crises, clear, strong, concise, and very effectively instrumented. Not so great as Beethoven's Coriolanus overture, it is his nearest approach to that, and shows that Mendelssohn was capable of something more impassioned, concentrated, fateful, than dreams of fairyland, breathings of sentiment and reproductions of romance.

Now for his Symphonies. First, his greatest, in A minor, which is supposed to owe its inspiration to his recollections of Scotland. In its wild, tender, melancholy melody and coloring, its romantic, breezy, sea-shore character, it has affinity with the Hebrides overture. How deep and tender the introductory Andante con Moto, 3-4! And how charmingly the kindred Allegro melody, 6-8, sets out from it and runs so smoothly and so rapidly, most of the way in octaves between the first violins and low clarinet tones! How it winds in and out among the instruments, now quiet and individual, now borne along upon the swelling, roaring tide of the whole orchestra! How it keeps its sweet, sad, minor mood, relieved only by one little bit of sunshiny major! Then, after the repeat, what wild, strange, sea-shore modulations, the cool, mysterious thrill of ocean and the Infinite! And when again those shuddering modulations cross the smooth mirror, the excitement swells to a furious climax, and all the strings rush up and down the chromatic scale with a tremendous vehemence; and it all dies down again, till only flutes and reeds are left streaming in the air, sliding leisurely down tone by tone, and leading back to the Andante. Compare this exciting climax with one correspondingly placed in the seventh symphony of Beethoven; if it has not that Promethean fire that could defy Olympus, is it feeble in comparison?

In the Scherzo the scene shifts to sunny playfulness. Vividly the laughing theme leaps out from voice after voice; the instruments seem to speak, as Schumann says, like men. What hurrying, huddling gleesomeness in the accompaniments, like the tiny waves that crowd up round the spot where the fountain's column falls! In hushed staccato the strings whisper a new motive, which is taken up by all and developed, with fragments of the laughing theme; and there seems to be a pointed allusion, fond and playful, to a characteristic of Scotch melody, in that emphatic mocking of the cadence of a minor third! It floats sportively away, in the violins, against a skyey background of oboe and horn tones, charming the soul away with it in pleased forgetfulness, when with a sudden revulsion of consciousness we are in the minor chord of D (like a great sob, escaping involuntarily), leading with solemn, stately measure and a sound of warning into the Adagio in A, 2-4, a most lovely, deep and tender movement, in which the orchestra seems to sing a Psalm of Life.... Upon this bursts, like a flash of sunshine over the sombre water, the Vivacissimo, a most dashing, brilliant theme, pausing anon to let a more pensive melody of reeds be heard; but with rough, impatient vehemence the basses break off the episode, and the bacchic frenzy of the movement storms itself away again, until its force is spent, and the quiet naïve little reed theme gets another chance and runs fondling and chatting along in duet between bassoon and oboe, and the strain sinks to sleep as in the fairy overture. The short finale, in A major, is in kindred melody and rhythm with the first Allegro, but with a bold and swaggering carelessness of movement, as of a party breaking up and marching off from a glorious carouse, to the tune (at least its spirit) of "We won't go home till morning!"