During this month, each weekday I'm posting an image showing Cornwall's First World War.
Cornwall's easternmost naval base was HMS Defiance, situated at Wearde Quay on the River Lynher. Wearde Quay received occasional British submarines, from the old A Class to the somewhat less dangerous D Class, the surface-power engines of which ran on diesel rather than petrol.
My book, 'Cornwall In The First World War', is published by Truran. With 112 pages and 100 images, you'll find it in bookshops across the Duchy. It's also available through Amazon: http://amzn.to/19JbtZm