Try picking up any piece by Artemus Ward, for instance (a contemporary of Mark Twain).The dialect is so thick that the dialogue is unreadable.

• 福楼拜听后，不主张他写这些故事，而希望他作这样的锻炼：骑马出去跑一圈，一两个钟头之后回来，把自己所看到的一切记下来。