If anyone is interested, here is a short and rather basic general commentary on Saki {including some references for further reading} which nonetheless throws out some interesting {but by no means completely complimentary} ideas about him.
Strangely, Saki was a conservative supporter of the Empire and still deeply critical of the Edwardian society it produced which he contemptuously portrayed with a veiled but malicious innuendo. I've also become aware of a streak of cruelty in his writing--but perhaps it's better to save that until the discussion.
http://kirjasto.sci.fi/saki.htm