I have a picture, copyright by Edward Gross Co N.Y. It is titled "Mother!". It is a picture of a woman sleeping in a wicker chair with knitting on her lap. There is a "ghost" or it's probably a dream, since she is sleeping, of a young man, presumably her son? At the front door, in a uniform.. would say it looks like WWI. It is a watercolor. At the bottom, under the picture it says, Painted by Robert B Robinson. There is no signature. Does anyone know anything about this painting? Any value?