What was the name of the magazine that first published 'The Celebrated Jumping Frog of Calaveras County'?

The magazine that first published “The Celebrated Jumping Frog of Calaveras County” was The New York Saturday Press. The story appeared there on November 18, 1865, though its original title was “Jim Smiley and His Jumping Frog.”

Mark Twain wrote the tale after encouragement from humorist Artemus Ward. Ward intended to include it in a book, but when Twain's completed version arrived too late, Ward submitted it to The New York Saturday Press. The publication gave Twain national attention, and the humorous account of a compulsive bettor and his unusually talented frog quickly circulated through other newspapers and magazines.

The title most readers know came later. Bret Harte published a revised version in The Californian on December 16, 1865, calling it “The Celebrated Jumping Frog of Calaveras County.” The story then became the title piece of Twain's first book, published in 1867. The Saturday Evening Post and Harper's Weekly are common guesses, but neither was the first publisher.