Robert K Johns is a retired businessman who has spent many years working closely with military authorities worldwide, undertaking many research projects on their behalf. He was born in Cornwall and comes from a long line of underground tin miners. On discovering that his grandfather had been a a tunneller in the Great War, Robert researched extensively into his life, and using many authenticated records and archives, he has traced the history of 251 Tunnelling Company from its establishment in Cornwall to demobilisation. He is currently working on another book looking at the individual stories of some of these men.