Thomas Jefferson Papers
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William King (of South Carolina) to Thomas Jefferson, 17 April 1818

From William King (of South Carolina)

Greenville District, So. Carolina, April 17th 1818.

Sir,

the subject on which I venture to address a few lines to you I hope1 will not be disagreable. With becoming modesty I venture to say I have discovered a Method for finding the Longitude at Sea, exceedingly plain & easy. The President of the So. Carolina Colege has examied it, & has writen on2 it that he has not seen any thing similar to it in any Author. By this Method, both the Lattitude & Longitude may be found by the same Observation, with ease & accury. To which is added a plan for finding the Longitude at Seaport Towns, or any where else on land to great ceirtainty; & is different from all other Methods that I have seen. This perhaps may answer a valuable purpose for finding Longitude3 at Towns, & Seats of government on the vast Continent of America.

Mr Samuel Farrow (once a Member of Congress) advised me to write to you, & request you to inspect sd Discovery: adding that your Opinion (if favorable) would be of great weight. This discovery has been made after years of intense Study; & when the main principle wheron ceirtainty may rest appeared, it was like a Ray of light from the Sun.

If Sir, you will pleas to inspect the labor of one of the real Sons [of]4 America, I earnestly request you would be so good as to favor me with a letter expressing your pleasure: and I can send you a Copy of this discovery in manuscript. This plain & unaffected way of writing, I hope will pleas a great Man and Philosopher better than flattering expressions. With Sentiments of great regard, & good wishes I remain Yours &.c.

William King

RC (DLC); endorsed by TJ as received 18 May 1818 and so recorded in SJL.

William King was born in Virginia and lived from at least 1800 until the 1840s in Greenville County, South Carolina. Census records begin listing him as a clergyman in 1830. King did not patent his discovery (King to TJ, 4 June 1818; DNA: RG 29, CS, S.C., Greenville, 1800, 1820–40).

The president of South Carolina College (later the University of South Carolina) was Jonathan Maxcy.

1Preceding two words interlined.

2Manuscript: “on on.”

3Preceding three words interlined.

4Omitted word editorially supplied.

Index Entries

  • astronomy; and W. King’s method of calculating latitude and longitude search
  • Congress, U.S.; mentioned search
  • Farrow, Samuel search
  • geography; W. King’s method of calculating latitude and longitude search
  • King, William (of South Carolina); and calculation of latitude and longitude search
  • King, William (of South Carolina); identified search
  • King, William (of South Carolina); letters from search
  • latitude; W. King’s method of calculating search
  • longitude; W. King’s method of calculating search
  • Maxcy, Jonathan; president of South Carolina College search
  • schools and colleges; South Carolina College (later University of South Carolina) search
  • South Carolina College (later University of South Carolina); president of search