Where did Webster look up the definitions when he wrote the dictionary?

Here are the origins of Webster dictionary:



In 1843, after Noah Webster's death, George and Charles Merriam secured publishing and revision rights to the 1840 edition of the dictionary. They published a modest revision in 1847, and a second update with illustrations in 1859. In 1864, Merriam published a much expanded edition, largely overhauling Noah Webster's work, yet retaining Webster's title, "An American Dictionary." This began a series of revisions known as "Unabridged," which became increasingly more "Merriam" than "Webster."



With the edition of 1890, the dictionary was retitled, "Webster's International." The vocabulary was vastly expanded in "Webster's New International" editions of 1909 and 1934, totaling over half a million words. Merriam overhauled the dictionary again with the 1961 "Webster's Third New International" under the direction of Philip B. Gove, making changes which sparked public controversy.



The "Collegiate Dictionary" series was initiated in 1898. Since the 1940s, the company has added many specialized dictionaries, language aides, and other references to its repertoire.



The G. %26amp; C. Merriam Company lost its right to exclusive use of the name "Webster" after a series of lawsuits placed it in public domain. Its name was changed to Merriam-Webster Inc. with the publication of Webster's Ninth New Collegiate Dictionary in 1983. The company has been a subsidiary of Encyclop忙dia Britannica Inc. since 1964.Where did Webster look up the definitions when he wrote the dictionary?
I think Alex Karras taught him the definitions.

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