Peter Bartholomew was a French peasant from Provençe who, while on Crusade, began having visions. He functioned as a soldier after the capture of Antioch on 10 June 1098 when reinforcements came from Muslims, and in the ensuing siege of the city, suffered from famine like the rest of the Christian occupiers. In this weakened state, he had visions of St. Andrew, which he shared with the Crusade's leaders.
In the visions, St. Andrew took him to the Church of St. Peter inside Antioch and showed him the resting place of the Holy Lance. This was the spear of the Roman soldier called Longinus who used it to pierce the side of Jesus while on the Cross. (The True Cross was another relic that was found in the east.) The leaders were skeptical, and Peter warned them that their disbelief would cost them three days in hell's fires. As Peter's news spread to the rest of the army, excitement grew, and the boost in morale was seen as a good thing, so Peter's story wasn't challenged. The visions also singled Raymond of Toulouse out for a special role in the Crusade. (Although Raymond would make a more humble decision later.)
Raymond and 12 select men went to the place where the Lance was supposedly buried and began digging. After a day of digging, they found nothing. Peter's vision claimed that he had seen St. Andrew place the lance in the ground; it should have been closer to the surface, but a day's worth of digging found nothing. Another twelve were chosen to continue digging, but they found nothing.
Peter was then dropped into the hole to see for himself. He urged everyone above to pray, and while they were praying and no one could see him clearly, Peter shouted the discovery of the Lance, its point sticking up from the earth.
This was fortuitous, but also questionable. As with the visions themselves initially, the sudden discovery by Peter alone was hard to believe and yet a source of great joy and morale for the troops. A letter was even sent to Pope Urban II from Bohemund of Taranto mentioning the Lance and that its presence emboldened the troops.
This morale boost was important, because Antioch was surrounded by the forces of Kerbogha, the atabeg of Mosul. The next step for the Crusaders (and a test for the importance of the finding of the Lance), came next. I'll tell you about it tomorrow. And we are not done with Peter Bartholomew.