The Patchwork Girl of Oz
And that was the way Dorothy heard that the Historian wanted to speak with her, and there was a Shaggy Man in the Land of Oz who knew how to telegraph a wireless reply. The result was that the Historian begged so hard to be told the latest news of Oz, so that he could write it down for the children to read, that Dorothy asked permission of Ozma and Ozma graciously consented.
That is why, after two long years of waiting, another Oz story is now presented to the children of America. This would not have been possible had not some clever man invented the "wireless" and an equally clever child suggested the idea of reaching the mysterious Land of Oz by its means.
L. Frank Baum.
"OZCOT" at Hollywood in California