The term 'Dagger Holder' refers to someone who carries a SHEATH, which is a protective covering for a blade or other sharp object. This job is often associated with warriors and soldiers, as they would need to carry a dagger or sword in order to protect themselves in battle. The SHEATH would provide protection for the blade and also make it easier to carry. In modern times, this job is not as common, but it is still important for those who work in security or law enforcement, as they may need to carry a weapon for self-defense.