I found this story from the-- Daily Leavenworth Times Jan.23,1864 paper(Pro-Union account)Kansas.
scroll down abt 3/4 on pg link---find---
Ft. Gibson C.N.Dec.23,1863--Incidents of the late fight in the Indians C.N.Dec.23.1863,with Quantrill and
Stand Watie.
The story at the end stated 50 killed or wounded--that sounds unlikely to me? but the story is cleaver.