Here he is at last - M.Emile Hermes on his rocking horse. I saw it in another colourway - potiron, I think. Thanks HG for the original photo posted earlier in this thread.
Serenity Now and Provcoll - In addition to the Fantaisie a Cheval colourway post 595, I have seen two more colourways - one in reds, and the other in pastel blues.