King Melchior is shown kneeling before Child Jesus and offering his gift of gold coins.

Behind him King Caspar, with his crown dangling behind his head, takes his gift of frankincense from an assistant in readiness to present it.

[2] The magi are thus shown twice, once in the foreground and again in miniature in the background, arriving with their retinue from Africa, Europe and Asia.

An x-ray examination of the underdrawing shows that originally the European retinue of Melchior had him riding a horse and this was later changed to a dromedary.

This is surprising, because early camels in 'Three Kings' paintings tend to represent the retinue of Balthasar, who was said to have come from Ethiopia (often meant to symbolize the rest of Africa).