Hi frankby,
Yes, thank you, I was sent a photo of the Jowett graves by a Mellor local with whom I was able to make contact. She is, in fact, a relative of the late William Jowett, but I do not feel at liberty to pass on her details to you. My contact with her was made through the kindness of Mellor Church admin.
Although I've done a bit of research on the Jowetts, all on-line, I've come across nothing about Townscliffe Golf Club. I just know that William became involved in a lot of ….."things".
Do you know of Geoffrey Heath, a Mellor local, who wrote a book entitled "A Mellor Boyhood"? While his book may not contain anything of interest to you, perhaps he has some knowledge of Townscliffe Golf Club that is of interest. But...um....he was elderly when I was in contact with him probably 10 years ago, so.....?
Sorry I can't help you more, but good luck.