DJIA Monthly since 1884
Note: “The start of WWI in July 1914 led tot he NYSE being closed from July 31, 1914 until December 12, 1914. Dow Jones then started a new Industrials Average, and the book gives you both prices. The series most of the erroneous charts use makes it look like the index closed down from 71.42 and reopened at 54.
That is just flat WRONG and any charts drawn from such data are just flat WRONG.