Darkness ended the assault. As Jackson and his staff were returning to camp on May 2, they were mistaken for a Union cavalry force by the 18th North Carolina Infantry regiment who shouted, "Halt, who goes there?", but fired before evaluating the reply. Frantic shouts by Jackson's staff identifying the party were replied to by Major John D. Barry with the retort, "It's a damned Yankee trick! Fire!" A second volley was fired in response; in all, Jackson was hit by three bullets, two in the left arm and one in the right hand. Several other men in his staff were killed, in addition to many horses. Darkness and confusion prevented Jackson from getting immediate care. He was dropped from his stretcher while being evacuated because of incoming artillery rounds. Because of his injuries, Jackson's left arm had to be amputated by Dr. Hunter McGuire. Jackson was moved to Thomas C. Chandler's plantation named "Fairfield". He was offered Chandler's home for recovery, but Jackson refused and suggested using Chandler's plantation office building instead. He was thought to be out of harm's way; but unknown to the doctors, he already had classic symptoms of pneumonia, complaining of a sore chest. This soreness was mistakenly thought to be the result of his rough handling in the battlefield evacuation.