'A Centaur teaching Apollo'

Photograph of a pencil engraving depicting a centaur and Apollo. The centaur holds a bow and arrow and gazes to the right. Apollo stands in front of the centaur and similarly holds a bow and arrow, He turns his head to look at the centaur. The two figures are located in a rocky environment.  

The caption indicates the engraving is meant to depict the centaur teaching Apollo how to use a bow and arrow.