Lakehead University researcher delves into 200-year-old Caribbean mystery

A team of researchers led by an anthropologist at Lakehead University, in Thunder Bay, Ont., is shedding new light on what caused the deaths of sailors buried at a British Naval Hospital cemetery in Antigua in the late 1700s and early 1800s.

People have long thought that the deaths were linked to lead contamination in their daily rations of rum, said Tamara Varney, who has been studying the deaths since 2009, adding that the alcohol was made with lead equipment.

Varney and her team have been able to access skeletal remains, and test them using a powerful piece of technology that acts as a giant microscope, allowingthem to map out the lead in the bones.

• Mysterious 18th-centurysailors' deaths could be solved

What they found was somewhat surprising, said Varney.

"I had suspected that we would see mainly levels that would be much higher than today, and maybe some that would be very extreme," she said. "Instead what we're finding is they're all over the map."

"There's some that are very extreme and then there's some where it looks like maybe they were exposed to very little lead in their lifetimes," Varney said."It barely registers."

The researchraises new questions about the longstanding theory, and aboutwhy sailors were exposed to lead to such varying degrees, she said.

Her team is also trying to solve the mystery of where the lead came from, she said. Contaminated rum is still a strong possibility.

"There were physicians at the time saying 'hey this is due to lead poisoning, possibly due to the rum that they're drinking,'" said Varney.

"And it was just dismissed. No one believed it."