1To Thomas Jefferson from Benjamin Ferris, 20 June 1803 (Jefferson Papers)
Pursuant to the directions of Isaac Briggs I have completed a Clock for thee. he informed me that it was not in any degree for ornamental purposes and particularly requested that it might be made plain; The workmanship is good, and the regulation nearly perfected. I had the rod of the pendulum made of well seasoned Wood, it being less affected by the changes of the weather than either Brass or...