I have an original oil painting with a signature ´Rousseau´ in the bottom right hand corner. Can you identify the artist please?

Can we have a picture of the oil painting? It would definitely make identifying the picture and the artist much, much easier.

Unfortunately I cannot answer this question but do have a similar one. I have two small oil paintings and although they have signatures I can't be sure what the letters are. Does anyone know of a site where I can see names of artists where I might stumble across something? Also, both frames have a series of numbers engraved on the back? Does anyone know what those numbers might represent?

Any and all help and advice is appreciated.