There are numerous references to Mayor/ General George W. Collamore in the many books on the Lawrence raid.
From "Dark Friday" by W. C. Pollard, "Early in the summer of 1863 Mayor Collamore asked the military to place a permanent military garrison in Lawrence."(p. 21). "Mayor George Collamore and his family lived a little to the north of Dr. Griswold and his family discovered upon waking up that their house was surrounded by guerillas and escape was impossible. A building attached to the house contained the well and Collamore and Patrick keith, his hired man, descended into the well to hide. They were never spotted by the guerrillas, but the family was robbed and the house was burned, which resulted in much smoke billowing down into the well. After the guerillas left lawrence, Captain J. G. Lowe lowered himself by a thin rope to rescue the men, but they had suffocated from the smoke. Lowe's rope broke, and he, too, died in the well. "Other accounts state that Lowe suffocated rather than died from the fall. Also, from "The Devil Knows how to Ride"by Edward Leslie, on p. 217, "Coming in the opposite direction was a teenage son of Mayor Collamore, on his way to hunt chickens. The column split and the boy was enveloped. The bushwhackers cut loose, and young Collamore fell off his horse, several severe wounds in his arms and legs. The assailants left him for dead, but he was carried to safety, and made a slow recovery."
By the way, the Collamore house is still standing at the corner of Louisiana and 7th st. in Lawrence.