1Thomas Jefferson to Thomas Erskine Birch, 3 January 1812 (Jefferson Papers)
I duly recieved the favor of your letter wherein mention was made of a volume inclosed in it...
2Thomas Jefferson to Thomas Erskine Birch, 21 March 1812 (Jefferson Papers)
Your favor of 24 th Feb. was recieved a few days ago. soon after the date of mine to you of Jan....