“The mud shell encasing the body of a mummified woman within the textile wrappings is a new addition to our understanding of ancient Egyptian mummification.” Karin Sowada et al

Mud packs today are used as beauty treatments and you can even go so far as to have a mud bath to fully immerse the body. But thousands of years ago Egyptians were using mud as part of the mummification process.

Sir Charles Nicholson bought the mummified body of a woman from the late ‘New Kingdom Dynasty’ with its lidded coffin and mummy board when on a trip to Egypt in 1856-7. He donated it to the University of Sydney in 1860.

The coffin inscription identifies the owner as a titled woman named Meruah, and the iconography dates it to approximately 1000 BC. Though the mummified individual underwent a full computed tomography (CT) scan in 1999, researchers recently rescanned the body using updated technology.

The new analysis reveals she had a rare mud carapace.

Studies of mummified bodies from the late New Kingdom to the 21st Dynasty (c. 1294-945 BC) have occasionally reported a hard resinous shell protecting the body within its wrappings, especially for royal mummies of the period.

Karin Sowada from Macquarie University, Sydney, Australia, and colleagues have described their discovery of a rare painted mud carapace enclosing an adult mummy, Meruah, in Sydney’s Chau Chak Wing Museum.

Using this new visualization of the dentition and skeleton, the authors determined the mummified individual was a young middle adult (26-35 years). Though the body scans did not reveal external genitalia, and internal reproductive organs had been removed during the mummification process, osseous secondary sexual characteristics (hip bones, jaw, and cranium) strongly suggest the mummified individual was female.

The current analysis of the mummification technique and radiocarbon dating of textile samples from the linen wrappings place the mummified individual in the late New Kingdom (c. 1200-1113 BC).

This means the body is older than the coffin, suggesting local 19th century dealers placed an unrelated body in the coffin to sell as a complete set.

The new scans also revealed the extent and nature of the mud carapace, showing the mud shell fully sheaths the body and is layered within the linen wrappings. Images of the inmost layers indicate the body was damaged relatively shortly after initial mummification, and the mud carapace and additional wrappings applied to reunify and restore the body.

In addition to its practical restorative purpose, the authors suggest the mud carapace gave those who cared for the deceased the chance to emulate elite funerary practices of coating the body in an expensive imported resin shell with cheaper, locally available materials.

Though this mud carapace treatment has not been previously documented in the literature, the researchers note it’s not yet possible to determine how frequent this treatment may have been for non-elite mummies in the late New Kingdom of ancient Egypt–and suggest further radiological studies on other non-royal mummies may reveal more about this practice.

The study was published on February 3, 2021 in the open-access journal PLOS ONE by Karin Sowada from Macquarie University, Sydney, Australia, and colleagues.