1To Thomas Jefferson from Burgess Allison, 1 March 1801 (Jefferson Papers)
Knowing the Pleasure which evry improvement in the Arts and Sciences afford you, and especially those mechanical Arts which promise to become useful to Society; I have taken the liberty of communicating to you one, made by Mr. Hawkins upon Saddles, which appears to answer the purpose design’d exceedingly well. It is the application of spiral brass wire Springs to the Seat and Stirrups of...