To describe in technical detail the examination we made would not interest the general reader of this strange narrative. The average man or woman knows nothing or cares less for the duodenum or the pylorus; therefore it is not my intention to go into long and wearying detail. Suffice it to say that we preserved certain portions of the body for subsequent examination, and together were engaged the whole evening in the laboratory of the hospital. Tatham was well skilled in the minutiae of the tests. The exact determination of the cause of death in cases of poisoning always depends partly on the symptoms noted before death, and partly on the appearances found after death. Regarding the former, neither of us knew anything; hence our difficulties were greatly increased. The object of the analyst is to obtain the substances which he has to examine chemically in as pure a condition as possible, so that there may be no doubt about the results of his tests; also, of course, to separate active substances from those that are inert, all being mixed together in the stomach and alimentary canal. Again, in dealing with such fluids as the blood, or the tissues of the body, their natural constituents must be got rid of before the foreign and poisonous body can be reached. There is this difficulty further to contend with: that some of the most poisonous of substances are of unstable composition and are readily altered by chemical reagents; to this group belong many vegetable and most animal poisons. These, therefore, must be treated differently from the more stable inorganic compounds. With an inorganic poison we may destroy all organic materials mixed with it, trusting to find the poison still recognisable after this process. Not so with an organic substance; that must be separated by other than destructive means. Through the whole evening we tested for the various groups of poisons--corrosives, simple irritants, specific irritants and neurotics. It was a long and scientific search. Some of the tests with which I was not acquainted I watched with the keenest interest, for, of all the medical men in London, Tatham was the most up to date in such analyses. At length, after much work with acids, filtration, and distillation, we determined that a neurotic had been employed, and that its action on the vasomotor system of the nerves was very similar, if not identical, with nitrate of amyl. Further than that, even Tatham, expert in such matters, could not proceed. Hours of hard work resulted in that conclusion, and with it we were compelled to be satisfied. In due course the inquest was held at Shadwell, and with Ambler I attended as a witness. The reporters, of course, expected a sensation; but, on the contrary, our evidence went to show that, as the poisonous substance was found in the "quartern" bottle on deceased's table, death was in all probability due to suicide.