English: Irene and Vernon Castle posed as instruction for dancing their version of the tango. From their 1914 book "Modern Dancing" published by The World Syndicate Co. by arrangement with Harper & Brothers.
The author died in 1969, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 50 years or fewer.
{{Information |Description=Photograph of Irene and Vernon Castle posed as instruction for dancing their version of the tango. From their 1914 book "Modern Dancing" published by The World Syndicate Co. by arrangement with Harper & Brothers. |Source=http://
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