D is for Devil from A Dark Alphabet designed by Julie and Becky's Note of Friendship blog. So you might be wondering why there is a monkey in this picture? In Dutch samplers the stitchers would often use a Spinning Monkey to represent the Devil rather than tempt bad luck by stitching Old Nick himself. The monkey stood for folly, laziness, lechery and vanity and his punishment was to be turned into thread.
I wonder if we get a bit of "monkey thread" sometimes, you know where it knots and twists and won't lay neatly no matter what you do?
If you like your devils on the cute side, Ellen Maurer-Stroh has a series of stitching devils, this one has a bobbin (ready to tangle?) and there is one with a pincushion and a sweet pair playing with a sewing machine.
Probably the most common image for Death in cross stitching is the gravestone (but I'm saving those for G!) or some of the verses stitched on antique samplers. For example this piece by Amy Ball which includes the couplet "When I am dead and in my Grave, my Friend's in Hand my work may have":