That's an interesting proposition. I wasn't aware of their *friendship* or that it was long. I just flicked through a couple of biographies and none mention it. I would imagine that his more famous *friendship* with John Ruskin, who supported and prohibited Turner, would have been more influential. He wrote about him in *Modern Painters* under an alias to get attention for him, but he also destroyed almost all of Turner's erotica art and a substantial amount of his abstract works as he believed both would damage his reputation. He probably also fought with him about the fat over lean rule
Just out of curiosity, what is it about Martin that you think would have influenced him? Where he is mentioned in the books I have here, it all indicates that Martin was influenced by Turner and not the other way round. I'd like to find out more though.
Alison A Raimes