a couple of these articles may be useful:
http://www.ingentaconnect.com/searc...ar_from=1997&year_to=2005&pageSize=20&x=0&y=0
the paucity of the resources you believe you have to work with is both good and bad. the lack of criticism means that you will be among the first people to analyse his work, which makes you (after yr research) more expert in the area than the people marking your work. that can't be bad. however, on the negative side, do you feel there's enough out there to allow you to get sufficient material to work with? i believe there will be, as reviews in literary magazines like the times lit supp etc should give you further leads, as well as an appreciation of the state of play of mcewan criticism.
as he's still alive, i'd recommend you consider writing to him to find out more, which will (imo) add to the value of your dissertation, show initiative, and allow you to clear up any obscure points your other research may raise. also, the people marking your dissertation can't check the full contents of your interview or correspondence so - as it's perfectly valid to cite letters and interviews - they can't be easily refuted.
it sounds very interesting, and for further research i'd recommend using a newspaper database like lexis nexis and the websites of the tls &c.
good luck!
