No problem, Linda. The Guthrie men in the 10th Arkansas Infantry are located in the Compiled Service Records of Confederate Soldiers Who Served in Organizations From the State of Arkansas, Microcopy 317, Roll 119.
The Guthrie in the 15th Arkansas Militia is located in the same record group, Roll 149.
These records are located at the National Archives and Records Administration.
Let me know if I missed anyone.