On September 20th, 1924 Sir John Marshall published his story A FORGOTTEN AGE REVEALED that announced the discovery of the ancient Indus civilization to the world for the first time. But he did not know how old the new discoveries and writing discovered in Harappa and Mohenjo-daro was. He asked readers for help. One of them wrote a Letter to the Editor that told the astounding truth and pushed back our understanding of Indian history by 2,000 years. This under 2 minute video tells that story and shows all the images first shown in the article.

The single images and captions and Sir John Marshall's introductory story is available as a slideshow The Discovery of the Ancient Indus Civilization.

Credit – and many thanks – for the photograph of Sir John Marshall in the video:
Unknown Photographer
Marshall with His Wife, Daughter and her Governess at Eastern Gateway of Great Stupa, Sanchi, c.1912–18
Silver Gelatin Print, 149 x 105 mm
Courtesy: The Alkazi Collection of photography (ACP: 94.34.0134)