Flói was slain by an Orc arrow during a great battle near the Mirrormere during a battle outside the Great Gate after he himself slew a great enemy. He was buried under the grass near the Mirrormere. His story is told in the Book of Mazarbul, which was found by Gandalf when he and the Fellowship passed through Moria, during their travels. 
- ↑ The Lord of the Rings: The Fellowship of the Ring, "The Bridge of Khazad-dûm"
- ↑ The Lord of the Rings: Appendix A, "Durin's Folk"