Beethoven’s works extend to every field of composition. They include five concertos for piano and orchestra, one concerto for violin and orchestra, sixteen quartets for strings, ten sonatas for piano and violin, thirty-eight sonatas for piano, one opera, two masses, nine overtures and nine symphonies--about forty vocal and less than two hundred instrumental compositions in all. The division of the work into three periods, made by von Lenz in 1852 is, on the whole, a useful and just classification, when due allowance is made for the periods overlapping and merging into each other according to the different species of composition. The ideas of his mature life expressed themselves earlier in the sonatas than in the symphonies; therefore the first period, so far as the sonatas are concerned, ends with opus 22 (1801), while it includes the Second Symphony, composed, as has been noted, in 1802. Individual exceptions to the classification also occur, as, for example, the Quartet in F minor, which, though composed during the first period, shows strongly many of the characteristics of the second. In general, however, the early works may be said to spring from the pattern set by Haydn and Mozart. In regard to this Grove says: ‘He began, as it was natural and inevitable he should, with, the best style of his day--the style of Mozart and Haydn, with melodies and passages that might be almost mistaken for theirs, with compositions apparently molded in intention on them. And yet even during this Mozartian epoch we meet with works or single movements which are not Mozart, which Mozart perhaps could not have written, and which very fully reveal the future Beethoven.’ In spite of being fully conscious of himself and knowing the power that was in him, Beethoven never was an iconoclast or radical. He was rather a builder whose architectural traditions came from ancient, well-accredited sources, in kinship probably somewhat closer to Haydn than to Mozart, though traces of Mozart are clearly evident. ‘The topics are different, the eloquence is more vivid, more nervous, more full-blooded--there is far greater use of rhythmic gesture, a far more intimate and telling appeal to emotion, but in point of actual phraseology there is little that could not have been written by an unusually adult, virile, and self-willed follower of the accepted school. It is eighteenth century music raised to a higher power.’[61]