1Thomas Jefferson to Jacob Alrichs, 10 August 1812 (Jefferson Papers)
When you were so kind as to exhibit to me at Washington your Spinning machine with 6. spindles (for I believe it was yourself who attended there) I understood you meant to employ your mind in the construction of a carding machine on the same scale, to go by hand, and if it succeeded, that I should be furnished with one one on request. I understand you have fully succeeded in it, and I now ask...