The first performance of this lyric tragedy at St. Germain was made especially attractive because the dances were executed by lords and ladies of the court, in conjunction with the ordinary dancers of the Royal Academy of Music. Many of the morceaux in “Atys” are worthy of mention. The critics of the time have greatly eulogized the air “Le Sommeil” in the third act, on account of the persistence of the rhythm in the bass (four quarter notes). Just as “Atys” was called the “King’s Opera,” so “Isis” received the name of the “Musicians’ Opera.” A music critic of the times writes as follows concerning the work: “This opera is the most erudite ever written by Lully, who spent an infinite time upon it. At the court performance, the great number of instruments, played by the most accomplished masters, contributed not a little to emphasize the beauties of the music.” M. de Lajarte, formerly the librarian of the Opéra library, and one of the principal collaborators of the publisher, Michaelis, of Paris, has recently realized the happy idea of reconstituting and condensing, with piano accompaniment, the masterpieces of the French opera of the seventeenth century, and he makes the following interesting remark respecting this “great number” of instruments: “The extraordinary number spoken of by Fresneuse dwindles down to trumpets in the prologue, and flutes at the end of the third act. But, by a happy coincidence, these two symphonic members of the work which so astonished our forefathers are also a subject of astonishment for us modern critics, at least in the matter of the trumpets. The degree of skill and certainty in tonguing displayed by the trumpet players in Lully’s orchestra was nothing short of marvellous.” The trumpet parts in the works of Bach and Handel are not less difficult of execution, and at this day it would seem that they could not possibly be played. Now that the music known as imitative has made such notable progress, frequently exceeding the limits of good taste, now that Meyerbeer, Berlioz, and, above all, Wagner have carried to such perfection the complicated art of orchestration, it is very interesting to read in the score of “Isis” the air imitative of the noises in nature and called the “air de Pan.” It enables us to realize the extraordinary progress made in instrumentation since Lully’s time. This air was exceedingly popular at that day. In addition to the sounds heard in nature, which are not made very prominent, however, this page of music is rich in declamation, and is not without charm. But sweeter to the ear, in our opinion, is the duet of nymphs in the second act. It is simple, clear, and remarkably graceful.