The Golden Web

Oppenheim, E. Phillips, using the pseudonym Partridge Anthony, is the author of The Golden Web. The Little Anna Gold Mine, which was found in South Africa by Stirling Deane, has been sold. He is now wealthy as a result of the sale and works as the Head of the business to whom he sold the mine. A former acquaintance from his time in South Africa has appeared and claims that he is the mine's owner and that he has the mine's original deed. A few times after meeting Deane, the man is found dead, and the deed he claims to have been missing. Another man who Deane used to negotiate the return of the deed to Deane was charged with the murder, found guilty, and given the death penalty. What happened to the lost deed?