Sometimes even the best writers make mistakes. Here are a few.
Robinson Crusoe comes out of the water naked to board a ship, then fills his pockets with biscuits.
Sir Arthur Conan Doyle
According to the author, Dr. Watson suffered a war injury. In A Study in Scarlet the injury was to Watson’s shoulder, but in The Sign of Four, it has moved to his leg.
In Abraham Lincoln–The Prairie Years, Sandburg has Lincoln’s mother singing a song that was not written until twenty-two years after her son’s death.
The bard wrote of a cannon in the reign of King John (cannons were unknown until about 150 years later); of clocks striking the hour in the days of Julius Caesar; and of printing in the days of King Henry II.
From Strouf, Judie LH: Literature Lover’s Book of Lists: Serious Trivia for the Bibliophile; Prentice Hall; 1998.