Day-by-Day / May 7, 1803

May 7, 1803

Delicate horizon

In Lancaster, Pennsylvania, master surveyor and cartographer Andrew Ellicott gives a letter to Meriwether Lewis who will soon deliver it to Robert Patterson in Philadelphia. In the letter, Ellicott discusses a key component of an artificial horizon.

Lancaster May 7th 1803

Dear Sir

This will be handed to you by my friend Captn. Lewis Secretary to the President of the U.S.

I have forwarded by this opportunity the apparatus for forming the artificial horizon, with some remarks relative to its use. The talc is very delicate, and easily injured,—it should therefore be handled with caution. And for fear of accidents the person using the apparatus should not be without some spare pieces.

I am with great esteem you friend and Hbl. Servt.

Andw. Ellicott

 

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Discover More

  • The Lewis and Clark Expedition: Day by Day by Gary E. Moulton (University of Nebraska Press, 2018). The story in prose, 14 May 1804–23 September 1806.
  • The Lewis and Clark Journals: An American Epic of Discovery (abridged) by Gary E. Moulton (University of Nebraska Press, 2003). Selected journal excerpts, 14 May 1804–23 September 1806.
  • The Lewis and Clark Journals. by Gary E. Moulton (University of Nebraska Press, 1983–2001). The complete story in 13 volumes.