"It seems to me however that the purely scientific part of the report [he is there referring to the report of the single joint expert] is, as I have said, the finding of pencil-marks underneath the contract signatures. The rest of the report is opinion. The pencil-marks are confined to the contract. The conclusion drawn by the expert in respect of the signatures on the contract is that the tracing over of the pencil-marks means that the signatures are not genuine but that conclusion is itself only an inference which may or may not be correct. There is no evidence which she can produce [he is there referring, I think, to the expert] as to who did the tracing. Her assumption, albeit unspoken, is that the original pencil marks were not put on the document by the defendants who were not in fact asked about it. It does not follow from any of that therefore that the signature on the TR1 [that is the transfer] is not theirs. The reasoning of the expert, in my judgment, contains a fallacy and moreover it seems contrary to the weight of all the other evidence."