The main English bird for Christmas in Dickens' day was generally a goose, and if Conrad had bothered to read "A Christmas Carol" further he would have noted that the Cratchit family actually had a small goose for their Christmas Day meal.

As for Conrad's idea of a "Fawkesian" celebration - "chants"? Where the hell do "chants" come from? Not from us in the UK. Where does the idea of roasting a 45lb turkey in earth come from? Not from us. The concepts are ludicrous.

The whole idea is as weird as English people celebrating Thanksgiving - it has no meaning for most of us whatsoever. Nothing wrong with Thanksgiving, I'm sure - but it's essentially an American custom.