Wings over the Western Front:*the*First World War Diaries*of Collingwood Ingram. Edited by Ernest Pollard & Hazel Strouts. Day Books ISBN 978-0-9532213-9-4
Collingwood Ingram is perhaps a rather forgotten figure these days, but in his day he was considered one Britain's most talented amateur ornithologists . He was regarded as an authority on both the birds of France and Spain (advising Mountfort et al on their famous Coto Donana expedition). A self taught artist, his sketches and drawings are very attractive and highly professional. He was also a world authority on flowering cherries, rhododendrons and other plants and an an authority on Japanese art (esp. netsuke). That's packing in a lot even for a centenarian!
He also served in the Royal Flying Corp during WWI and his war diaries, packed with handsome sketches, have just been published (30/06/14) by Day Books (http://www.day-books.com). Note some online sellers have it marked as unavailable, but it is available from the publishers. There's more about Ingram on the author's website (http://erniepollard.jimdo.com/wings-...western-front/) which also has a sample page for download.
I must declare an interest (and bias) here as I helped the author in a small way with ornithological enquiries, but I think it an interesting and utterly charming book. As indicated above his drawings are decorative and interesting whilst the text gives an insight into the birdlife of Pas de Calais (where he was stationed) at the time and, naturally, the RFC & WWI. I know some here are aircraft/WWI buffs and will thoroughly enjoy this book,