"If the facts in issue are particularly within the knowledge of only one of the parties to a suit, that is a circumstance which
the Court must take into consideration in weighing the probative effect of the evidence adduced. Here the one party to the alleged
transaction of repayment is dead. The Court must therefore scrutinise with caution the evidence given by, and led on behalf of, the
surviving party. This attitude has been adopted by the Courts in a number of cases in which a claim was preferred against a deceased
estate, or a defence was set up to a claim by the estate. I may refer, inter alia, to Estate Lynch v Stewart, 1913 CPD 451 at p 454;
Estate Schickerling v Schickerling, 1936 CPD 269 at p 272; Estate van der Walt v Crooks, 1941 CPD 244 at pp 247-249 and decisions
reviewed there; to the remarks of Davis AJA, on the last-mentioned case in Moyce v Estate Taylor, 1948(3) SA 822 at p 827; and to
Wood v Estate Thompson and Another, 1949(1) SA 607 (N), where Selke J enunciated the principle, as deduced by him from the cases
to which counsel had referred him, in the following words:
'I am not aware of any rule of our law or of any practice of our Courts which requires that, merely because a claim is one made against
a deceased's estate, it must on that account be proved with a special degree of cogency, and I do not believe that any such rule
exists. If it did, it would no doubt work for the protection of the estates of deceased persons against fraudulent claims, but, on
the other hand, it might work considerable injustice on honest claimants against such estates. It seems to me that such a principle,
if it
13