This painting by Ubaldo Gandalfi has to be one of my favorite images of Hermes. I feel that it captures his personality as I see it.
It depicts Hermes (as Mercury) about to kill Argus. This was to free Io, who was turned into a cow by Zeus or Hera(the cow near the foot close to the edge). She was one of Zeus’ lovers and former priestess of Hera.
Diary of a Pagan Artist 