From A Wiki of Ice and Fire
Marcher ballads are ballads that originate from the Dornish Marches. Anguy knows some marcher ballads, every one of which is a hundred verses long. Tom of Sevenstreams finds them too long for his preferences. 
We sing real songs in the marches.—Anguy the Archer
- ↑ 1.0 1.1 A Storm of Swords, Chapter 13, Arya II.