The next witness is a witness worthy of all praise for the sincerity which he exhibited. I mean Dr. Wrightson. Now, gentlemen, this witness, who, I have no doubt, is a most scientific and a very honourable man, speaks as a man of science, and, according to him, the poison would be found in the body; but he speaks with proper caution, and upon his evidence you ought to say whether, under particular circumstances, it might not be discoverable, or whether the person seeking for it might fail to employ the proper means for detecting it in the body.
Then comes Mr. Partridge, a most respectable gentleman, who says he has been many years in practice as a surgeon, and is professor of anatomy at King’s College. Now, gentlemen, you have here the opinion of a very respectable witness as to the different topics that he touches upon; and the most important one is that he thinks that the symptoms that were exhibited did not correspond with what he should expect from strychnia; but he speaks from his own experience, and you have it from the other witnesses that the symptoms vary considerably in different cases.
The next witness is Mr. John Gay. Now, gentlemen, this was a case, you see, of tetanus arising from the toe being smashed; and it seems to me, although, of course, you will form your own opinion upon it, bears no analogy whatever to the case of Cook, with regard to whom no such cause could be assigned. Again, gentlemen, he says, what is very material, that, in the event of a given state of tetanus, it would be extremely difficult, if not impossible, without collateral evidence, to ascribe the tetanic disease to any cause in the absence of any evidence as to the cause. But you will form your own opinion upon it. Therefore you are to look to collateral evidence; and if the collateral evidence would impute the symptoms of tetanic convulsions to any particular cause, according to this witness that cause may be assigned. That I say with a view to get what is called the moral evidence with regard to the conduct of a particular person, and with regard to what he may have done or what he may have had in his possession.
Now comes Dr. M‘Donald. You will observe that he gives an account of experiments he made for the prisoner, and you will see the lengths to which he goes in adopting a new form of disease of epilepsy with these complications. You are to say what weight you give to that evidence compared with the witnesses who have given evidence before you.