Josef Holbrooke, born in England in 1878 was a prolific composer. He was fond of Edgar Allan Poe’s writings and one of his pieces “The Raven” contains a lengthy solo for the double bass. The bass comes in, dead cold, and the solo goes on and on and on. It is slow, marked Largo molto sostenuto and then has an Agitato section which leads in to an Allegro Sostenuto.
Technically it is not very difficult, but it needs to be played in a very prima donna fashion, maybe taking a little license in parts of it.
Holbrooke’s music isn’t performed very much nowadays, but if ever it comes up on one of your programmes be prepared!