Captain Blackadder's real-life inspiration?

An article at The Register talks about the recently published wartime memoirs of Captain Alexander Stewart, of the Cameronians:

"I am very much annoyed by memos sent round from Headquarters that come in at all hours of the day and night; they stop me getting a full night's rest and some of them are very silly and quite unnecessary.

"When I am very tired and just getting off to sleep with cold feet, in comes an orderly with a chit asking how many pairs of socks my company had a week ago; I reply 141 and a half. I then go to sleep; back comes a memo: 'please explain at once how you come to be deficient of one sock'. I reply 'man lost his leg'. That's how we make the Huns sit up."

Stewart's grimly black humour amid the carnage of WWI forms the highlight of his newly-published diary which lay forgotten until his grandson Jaime Cameron Stewart decided to make the book available online. He writes: "Ninety years ago my grandfather wrote a very personal and graphic account of his time on the Somme in the Great War. He typed three copies and called it The Experiences of a Very Unimportant Officer in France and Flanders during 1916 - 1917.

"Until now it has only been read by one or two members of my family and close friends. But now, as his grandson, I would like to share this amazing piece of personal history of his time in the trenches as an officer serving with the Scottish regiment The Cameronians. This account brings to life the reality and horror of what happened to him in those war-torn fields and the loss of life at Mametz Wood.

I hope you will find it equally fascinating."

I rather hope the book is eventually published in hardcopy, but it's currently available for download for £9.95. Five percent of the purchase price goes to the Royal British Legion's Poppy Appeal.