Hi Patricia,
It's probably D. N. McIntosh. He was more active (and younger--about 40) than Chilly (he was about 60). D. N. was commissioned a Colonel and Chilly was given a Lt. Col. commission. There was quite a bit of correspondence between D.N. and Pike, Cooper, and others in the late summer and fall of 1861. So it was probably D.N.--the Colonel. I hope this helps.

Gary