A native of Alexandria, Virginia, he was born in 1822. He drifted from job to job -groom, chandler, laborer, etc.- but was never really interested in his duties.
In 1861 he volunteered as a soldier in order to collect steady pay. Gaspar died during battle and awoke immortal, the Immortal, Lucas Desiree, found him and took as a student, Gasper discovered that he had a natural talent for the sword.
He was a decent duelist, and soon moved to head-hunting as his main occupation. Gasper was somehow always able to work the death of other immortals to his financial benefit.
In 1975, Gasper took on the young Immortal, Michael Christian as a student. On Independence Day 1979, Christian beheaded his teacher.
Gasper was monitored by Watcher, Rita Luce, from 1969 to 1979.