Reports of Trials for Murder by Poisoning; / by Prussic Acid, Strychnia, Antimony, Arsenic, and Aconita. Including the trials of Tawell, W. Palmer, Dove, Madeline Smith, Dr. Pritchard, Smethurst, and Dr. Lamson, with chemical introduction and notes on the poisons used

by G. Lathom Browne; active 19th century C. G. Stewart

“(2.) Having regard to the absence in her body of any morbid appearances sufficient to account for death, and to the presence in it of a substance known as capable of destroying life, her death must be ascribed to the action of antimony.

“(3.) That it is most unlikely that this poison was taken in a single large dose. Had this been the case, I should have expected to have found some more decided evidence of irritant action in the mouth, the throat, or the alimentary canal.

“(4.) That from the extent to which the whole organs and fluids of the body were impregnated with it, it must have been taken in repeated doses, the aggregate of which must have amounted to a large quantity.

“(5.) That from the large amount found in the liver, from its ready detection in the blood, and from its being found passing so copiously out of the body by the bile and the urine, it is probable that some of the poison had been taken at no greater interval than a period of a few days previous to death.

“(6.) That I am inclined to believe that it had not been administered, at all events in any great quantity, within a few hours of her death. Had this been the case, I should have expected to have found at least some traces of it in the contents of the stomach, and more in those of the intestines; whereas none was found in the former, and the amount found in the latter seems to be amply accounted for by the bile impregnated with the poison discharged into them from the liver.

“(7.) That the period over which the administration had extended cannot be determined by mere chemical investigation, but must be deduced from the history of the case, with which I am unacquainted.”

Dr. Maclagan then stated what portions of the bodies he had handed to Professor Penny for further analysis, and described the result of his examination of the solid residue obtained from Mrs. Pritchard’s body by the process adopted by Dr. Gamgee and Dr. Littlejohn.

“I determined the presence of mercury, and found a considerable quantity of antimony remaining in it. I got a clear fluid by operating on that residue with chlorate of potash and hydrochloric acid; and then passing sulphuretted hydrogen, I got a precipitate of a dirty orange colour, which was collected, washed and boiled in strong hydrochloric acid. The yellow colour disappeared, and the precipitate became black. The hydrochloric solution was then mixed with water and tartaric acid, and it gave an orange precipitate which, when collected and weighed, amounted to 0.082, equal on the whole to 1.265 of sulphuret of antimony—rather more than a grain and a quarter—in the whole of the solid residue. This was in addition to what had been found in the intestines after the precipitate had been obtained by Dr. Gamgee and Dr. Littlejohn. A grain and a quarter of sulphuret of antimony is equal to two and a half of tartar emetic; the amount of tartar emetic in the whole of the intestines would be about five grains and three-quarters (5.712).”

In cross-examination, Dr. Maclagan deposed to the discovery of about the three hundredth part of a grain of mercury in the 50 grains of sulphuret; that in some cases he was not content with the mere presence of the deposit on the foil, but boiled the copper foil in potash—namely, with the contents of the intestines and with the liver—but otherwise was content with the coloured deposit.