For those who are interested, Amazon.com and Amazon.co.uk has the book "Adventures of a Motorcycle Despatch Rider" by Capt. W.H.L. Watson in Kindle and hard copy editions. It is a good read and offers some insight into, and a different perspective of, the early days of WWI.

Adventures of a Despatch Rider Illustrated Edition Dodo Press: Amazon.co.uk: Captain W. H. L. Watson: Books