[S]he brought some of those apples. I was obliged to eat them, I was so hungry. It was against my principles, but I find that principles have no real force except when one is well-fed.

Mark Twain (1835-1910) American writer [pseud. of Samuel Clemens]

Story (1893), “Extracts from Adam’s Diary,” The Niagara Book
    (Source)

This was first published as one of the stories and sketches from various authors in The Niagara Book: A Complete Souvenir of Niagara Falls (1893), mentioning the story as "The Earliest Authentic Mention of Niagara Falls" (so named by Eve on the first Tuesday).

The story was first collected in a Twain collection in 1903 (My Debut as a Literary Person with Other Essays and Stories), and published as an independent book with this title in 1904.