The instrumentation of "Samson et Dalila" is rich and varied, yet never unduly complicated. Saint-Saëns knows how to distribute his effects with unerring certainty, and his work is a model of orchestral skill. The opera is scored for a very full orchestra, of which it may be interesting to give the composition. In addition to the strings and usual wood wind, he employs a third flute, a _cor anglais_, a bass clarinet, a double bassoon, four horns, two trumpets, two cornets, three trombones, a bass tuba, two ophicleides, two harps, three kettledrums, a _grosse caisse_, cymbals, a triangle, a _glockenspiel_, _crotales_, castagnettes made of wood and iron, a _tambour de basque_, and a tamtam. These constitute a powerful engine of sound, which is made subservient to the composer's will, and reproduces his thoughts with unimpeachable exactitude. "Samson et Dalila" perhaps remains the dramatic masterpiece of Saint-Saëns. His other operas may be equally remarkable in point of style and more elaborate in the matter of detail, but they often lack that apparent spontaneity which constitutes not the least charm of the Biblical work, and, although containing much that is admirable, are perhaps less inspired. Saint-Saëns could not write an uninteresting work if he chose, and musicians will find much to admire in his later operas. In "Samson et Dalila" he has succeeded in compelling the admiration of both musicians and the public at large, perhaps for the very reason that when he wrote it he did not attempt to please either, but was content to follow the bent of his inspiration without _arrière pensée_ of any sort. "Etienne Marcel," the composer's next opera, produced at Lyons in 1879, has not received the amount of attention due to its merits. The defects in this work arise from a certain want of unity, consequent upon the obvious desire of the composer to reconcile the conflicting elements of the old and the new schools. Putting such considerations aside, there can be no doubt as to the general effectiveness of the music. The subject deals with a stirring episode of French history. If in treating it the composer has not discarded the older forms associated with the "grand opéra" style, he has imparted a modern colouring to his score which goes far to redeem any shortcomings in this respect. He has been particularly happy in his treatment of the scenes of popular life that abound in this opera. There is a freshness and an irresistible _entrain_ in the ballet music, which is deliciously scored and abounds in charming details. The presence of a waltz in an opera, the action of which is laid in the fourteenth century, may cause some surprise, but it does not do to be over-particular in such matters, and much may be forgiven when the result is so pleasing.