Thank you very much for coming to see us about the writer / researcher position.
We had a very strong response and saw several candidates who were ideally suited to our needs. I am very sorry to inform you that on this occasion your application was not successful.
Thank you, however, for the interest you showed in XXX and we wish you all the best with your future career.
I hope you are not unduly disappointed. Unfortunately, as a matter of policy, we do not offer any post-interview commentary but we should tell you that from the very large number of applications we receive, we only choose to interview those candidates whose CVs are outstanding. Also, you are insane.
Best wishes,
&tc.
D for Dalrymple 
Chin up. This is normal – it’s an employers market right now. Plus, you didn’t want that job anyway, and this means you can find one ‘ideally suited to YOUR needs.’ 😉
Did you just add the last sentence or the last para?
tx
I would like to know the answer to the above question..
Four words may have been added to the actual e-mail. I’ll leave you to decide which ones they were.