At?certain?cadential?points,?he?inserts?brief?cadenzas that?add?an?improvisational?touch.

I could hardly keep from laughing when some of the cadenzas imitated the warbling of birds.

In some years, April bursts up Virginnia hills in one prodigious leap-and all the stage is filled at once, whole chorusesof tulips, arabesques of forsythia,cadenzas of flowering plum.