“Uncle Sam” first appeared as a cartoon figure (above) in the New York Lantern weekly newspaper. It was drawn by Frank Henry Bellew (pictured below). .
Cartoonist Frank H. Bellew
That’s not the correct 1st cartoon. The one you posted is from a 1862 Civil War Themed Harpers Weekly cartoon. The actual 1st cartoon is “Raising the Wind or Both sides of the story”. You can find it at this site (it’s not my blog, BTW). http://john-adcock.blogspot.com/2009/08/frank-bellew-1828-1888.html