1To Alexander Hamilton from Thomas Billington, 22 July 1799 (Hamilton Papers)
The Secretary of the War department hath requested me to Apply to you for Patterns of the Coats & Vests for the Cavalry, and as they will be speedily be wanted the sooner I am furnished with them the more it will Oblige your Most Obedient Humble Servant— ( ALS , Hamilton Papers, Library of Congress).