The geologist William Loftus died at the age of 38. Here is all you want to know, and more!
Biography - A Short Wiki
English geologist, explorer, and archaeological excavation expert who discovered the ancient city of Uruk, Sumeria in 1849. He was at one point the assistant geologist for the Geological Survey of India before falling ill.
In 1845 he married Charlotte Thulbourne. At 38 years old he died at sea.