In mid October 1862, troops led by Captain James “Paddy” Graydon of Fort Stanton killed at least eleven Mescalero Apaches at Gallinas Springs, on the west slopes of New Mexico’s Gallinas Peak. The circumstances were murky, but Graydon was thought to have gotten the Mescaleros drunk and then shot them down in cold blood.
Whatever had occurred, Graydon’s fellow officer Major Arthur Morrison believed Graydon had acted improperly. He demanded an official investigation. But when Colonel Christopher “Kit” Carson took command at the Fort Stanton later that month, he declined to get involved. After all, he wasn’t sure what had actually happened at Gallinas Springs.
However, Carson knew what happened next. Dr. John Marmaduke Whitlock of Las Vegas and Santa Fe arrived at Fort Stanton in early November and he wasted no time forming an opinion about Gallinas Springs. He heard all about it from Major Morrison, who he knew from Las Vegas. Whitlock was outraged at the news of the purported massacre, and he wasted no time in jumping into action. He excoriated Graydon at the Fort and also wrote a letter to the Santa Fe Gazette condemning the Captain.

Graydon was not pleased, to put it mildly. On the evening of Thursday, November 4, he confronted Whitlock and demanded an explanation. Whitlock put him off, saying he’d give Graydon the “satisfaction you desire” in the morning.
They were both apparently ready to render ‘satisfaction’ the next morning. The two men fired simultaneously. Although they were just yards apart, neither was hit. They continued to exchange shots, with Graydon behind a wagon and Whitlock crouched behind a nearby soldier’s tent in true gunfight style. Eventually, they managed to hit each other at the same time. Graydon was wounded in the chest and Whitlock took bullets in his side and his hand.
Soldiers carried Graydon into a nearby tent while Whitlock retreated into the sutler’s store, pursued by thirty of Graydon’s men, Lt. Philip Morris in the lead. When bullets started breaking through the store windows and door, Whitlock exited through the back door toward headquarters and Colonel Carson’s protection.
He didn’t make it. He was shot down, thrown into an icy ditch, and then shot some more. Lt. Morris was so beside himself with rage that when he ran out of bullets, he began pelting Whitlock’s body with rocks.
Three days later, 31-year-old Captain Graydon was also dead. One of Whitlock’s bullets had pierced his left lung.
In Carson’s opinion, the men responsible for Whitlock’s death deserved to “swing before sunset.” They got a court-martial instead, a somewhat pedestrian outcome to a bloody deed, especially the one at Gallinas Springs that precipitated the whole episode.
Source: Jerry D. Thompson, A Civil War History of the New Mexico Volunteers and Militia, UNM Press, Albuquerque, 2015.