Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Wag-by-Wall is a book written by Beatrix Potter, illustrated by J.J. Lankes, and published in Boston, Massachusetts by The Horn Book, Inc. in 1944. The story is about a poor grandmother who finds a stocking filled with gold in her fireplace on Christmas Eve and is able then to live happily ever after with her granddaughter. ''Wag'' is the pendulum of a clock. Potter considered the book a "pendant" to The Tailor of Gloucester.