Along with his interest in scuba diving Walter Lewis also spends a great deal of his spare time studying Great Lakes shipping.

He serves on two editorial boards and is completing his Ph.D thesis on the first generations of iron hulled steamboats. “The Cornwall” survived fifty years of service down the rapids of the St. Lawrence before she ended her career as a salvage vessel. She was one of the most historically significant vessels on the lakes.

The presentation on the Cornwall features dozens of historical images and underwater slides from his forthcoming book. 

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