Molly Wants A Cracker

I do not know where the whole thing of "Polly wants a cracker" originated but Molly enjoys a good cracker once in a while. She is very fond of Ritz crackers but she will still take a soda cracker or two if I am eating a bowl of soup. I researched the phrase Polly wants a cracker and it's origins date back to the early 1800's, possibly sooner. No one seems to be able to pinpoint the exact date or instance but Molly and I will take credit for starting the dog version of that phrase.