Hd Qrs Morristown 16th March 1780.
I have received your letter of the 11th of this month.
When the Army requires the service of the waggoners now employed as expresses and should the necessity continue for extending the number of express riders beyond the establishment you will use your discretion, proportioning what you may be obliged to call in to the real exigency of the case, and dismissing them as soon as that exigency is over—However useful the number of stationary Expresses which you point to, may be considered, yet we must not attempt any further innovation on this head at this time.
Your exertions during the precarious state of our supplies, I am well informed has been productive of very happy effects. You have my thanks, and I make no doubt of your continuing to do every thing in your power to forward the service. I am, Dr Sir &c.
DLC: Papers of George Washington.