I have continued to search for an image of Frank Bartes, without success. But, I have learned about him.
His full name was Francisco Antonio Bartes-Clarens. In Cuba, he was an extremely wealthy man, owning sugar and rice plantations, much real estate in Havana, and four of Cuba's railroads. He was also the President of Consolidated Railways of Cuba. So, how could that young guy on the left be him unless he inherited all that wealth?