This promiscuous and desultory warbling of his must, one feels, be irritating to the precise German mind; there is no method in it.

The music-loving German will organise him.

Some stout bird with a specially well-developed crop will be trained to conduct him, and, instead of wasting himself in a wood at four o'clock in the morning, he will, at the advertised time, sing in a beer garden, accompanied by a piano.

Things are drifting that way.
Your German likes nature, but his idea of nature is a glorified Welsh Harp.

He takes great interest in his garden.