1Robert Patterson to Thomas Jefferson, 23 January 1819 (Jefferson Papers)
Davenport, William; repairs telescope [index entry]
2Thomas Jefferson to William Davenport, 2 February 1819 (Jefferson Papers)
Davenport, William; repairs telescope [index entry]
3Thomas Jefferson to Robert Patterson, 2 February 1819 (Jefferson Papers)
Davenport, William; repairs telescope [index entry]
4Thomas Jefferson to William Davenport, 4 July 1819 (Jefferson Papers)
Davenport, William; repairs telescope [index entry]
5Thomas Jefferson to Robert Patterson, 4 July 1819 (Jefferson Papers)
Davenport, William; repairs telescope [index entry]