Conversation so far:
uncle sam is a symbol of which country
Uncle Sam is a common national personification of the U.S. federal government or the country in general
Who is Uncle Sam based on
Uncle Sam is based on Samuel Wilson. He owned a meat packing business in Troy, NY. During the War of 1812, he supplied food for the American soldiers

Question: Who was the first person to draw the personification
Self-contained rewrite: Who was the first person to draw the personification of Uncle Sam