While I'm working on that I leave you with something borrowed from another site. Although this particular letter is aimed at bureaucrats rather than writers, I think there are reminders there to all of us who have anything to do with writing.
I love this site. If you click on the archives tab you can find letters listed by the writer's name or type - including authors - as well as other categories. Each letter is transcribed below its original copy so remember to scroll down if you can't read the original.
Spare a thought for me murdering my darlings today, at least 1,500 of 'em!