The author provides information to Colonel Zimmer about Colonels Sisson and Townsend. Though the author signed the letter, possibly Jimmie, it is difficult to read and they provide no last name.
"Present prospective list of other witnesses to be called by the government on the merits in the case of United States vs. Colonel John C. Nickerson, Jr."
As will be presented in court, this document details the points the counsel will make in defense of Colonel Nickerson and the corresponding witnesses that will testify under those points for each charge and specification.
A list of potential witnesses to give testimony as related to certain important aspects of the case including Nickerson's character and Nickerson's testimony as it stands prior to the trial.