Nearly fifty years old at the time and already a very prolific and mature composer, Milhaud had never attempted a symphony before.

Mozart, when a mature composer and performer, would sometimes include the work of another-usually young and struggling-composer in one of his regular symphony concerts.

However, as I have said, this proportional factor is too abstruse for beginners to consider, even though for more mature composers it may well be an abiding concern.

The most ingratiating of these was the Holst, even if the mature composer himself had his doubts.

To the Editor: Most mature composers of serious music would agree with Alex Ross when he calls for music of "arrogance; indulgence; personality."

But fifteen years later he was writing that the work's interest lay only in its evidence of the mature composer, "on its own account it's a bit of a bore."

All these works show an already distinguished and mature composer.

But its lavish, evocative scoring is the work of a mature composer.

Here was a mature composer and a first-rate player, pulling together jazz's postwar strands: bebop language to the letter, tricky-meter tunes, free jazz, 20th-century classical harmony.

The sonata's least interesting moments are by its most mature composer.