Help needed solving a riddle

http://en.wikipedia.org/wiki/Second_Battle_of_the_Somme_%281918%29


"During the First World War, the Second Battle of the Somme of 1918"

"German Second Army back over a 55 kilometre front"

4th Division,

Happy Friday!

I went to the wood, and I caught it,
Then I sat me down and sought it,
The longer I sought,
For what I had caught,
The less worth catching I thought it.
I would rather have sold it than bought it,
And when I had sought, Without finding aught,
Home in my hand I brought it.

What Am I?

Ive asked everyone I know and no one can figure this out. Help please.

Who wears all black, drives and Mercedes and always has money?

air / Breath perhaps...