Three items: envelope with notation by 1st Lieutenant W. T. Robinson, "To file away for Safe Keeping for future reference should it be necessary;" Circular No. 52 -- Series of 1863 entitled "Invoice of Ordnance and Ordance Stores."
This questionnaire from the Ordnance Department requires every officer commanding a company or regiment of cavalry to answer the questions and return the form to the Ordance Office along with their regular quarterly return of ordnance stores.