1John Armstrong to Thomas Jefferson, 1 July 1818 (Jefferson Papers)
About the 1 st week in May last I received a request from an old and useful friend, to whom I could not well refuse a kindness, solliciting from me a letter of introduction to yourself and another to M r W. C. Nicholas . and adding, that he would set out for some of the watering places in your state about the 10 th of that month. I accordingly gave him a few lines for each of you and committed...