Charles Dickens left behind one, and only one, manuscript for “A Christmas Carol,” the tale he wrote in 1843 of an unfeeling rich man and the boy who pricked his conscience. Kept under lock-and-key for much of the year at the Morgan Library and Museum, the manuscript is not widely available, one reason, perhaps, why it has been all but impossible to track the many revisions Dickens made to the manuscript as he struggled to get his story right. A high-resolution copy of the manuscript's 66 pages, which you can examine below, may finally change that.