In the second and third letters, the requests for clarification were reiterated, and Ball's challenge was tentatively accepted on condition that some agreement could be reached on three experts and some show of good faith was forthcoming. However one might speculate on the reasons for Ball's failure to respond, two and a half months seems to me to be more than enough time spent on fruitless attempts to garner any response at all. If John Ball is serious about his challenge, he should at least acknowledge the attempts to answer it. If he is not serious, then he ought to remove the challenge from his web page. Instead, Ball refuses to answer any e-mail from myself or others .
Postal services do make mistakes, even on registered mail.
But it seems as if John Ball has abandoned the post office box, even though it is still advertised on his web page. In the meantime, it is worth noting that one highly qualified analyst has already examined Ball's claims and dismissed them. Dr. Bryant's analysis proves that the photographs were not tampered with. Bryant has shown that the shadows match other shadows in the photograph and that the positions of the shadows match the positions of four concrete objects seen in a late 1942 ground level photograph of the rear of the gas chamber. To my unpractised eye, the base of the shadows are slightly to the east of the centre roof beam, as I have previously speculated they should be based on far less clear copies of the photographs.