Mesopotamian Bibliography

It is always exciting to come across something new after you have been looking at the same data for quite some time. Today I ran across a title I had not seen before, and never new about the Mesopotamian connection. The book is Christopher Summerhayes: Soldier, Levant Consul & Diplomat.  Summerhayes apparently served in France, then to Meso where he also supported Dunsterforce. So he essentially covered the gamut of the campaign. I dont know much more about him, and will try to obtain the book myself. Anyone know anything more about this individual with regards to his World War I service?