1To Thomas Jefferson from John Allen, 12 March 1781 (Jefferson Papers)
Colo. Senf not returning, agreeable to his promise to me which was the 21st Ulto., I am much at a...
2To Thomas Jefferson from John Allen, 28 September 1802 (Jefferson Papers)
By hard Study, close applycation and long experiance I have found out a Successfull method of...