and sent to the Grand Châtelets prison. No further investigation was carried out on Perrine's accomplices, people Denys referred to as ‘Enemies of the Experiment’. In addition, the judge ordered that “no transfusion should be made upon any human body but by the approbation of the physicians of the Parisian Faculty (of Medicine)”, forcing Denys to end his studies in blood transfusions. After the Trial After the trial, Denys tried to rebuild his reputation as a transfusionist but the verdict clearly impaired that. Nonetheless, the appeal he made was given full consideration. The only transcript of the hearing we have suggests that the argument made by Denys’ lawyer, Chrétien de Lamoignin, was considered a masterpiece; yet, the whole procedure was surprisingly short followed by no discussion. The verdict was as expected against the practice of blood transfusion. The judge declared that transfusions could only be performed with the express approval of the Paris Faculty of Medicine, an occurrence remarkably remote. Denis returned to his home on the Left Bank, where he gave paid lectures to students as he had done before transfusion made him famous. Four years after the final trial at parliament, the former transfusionist set himself on the most unlikely of research paths: he invented styptic, an antihemorrhagic liquid, now found in medical cabinets all over the world. Denys dies in 1704 at the age of sixty-nine. Denys’ Haemostatic Solution In 1673, a series of experiments presented to the Henry Oldenbourg (1619-1677), secretary of the English Royal Society and editor of Philosophical Transactions, in London, introducing a substance created by Denys, referred to as ‘Liqueur hémostatique’ or ‘Essence de Denys’, supposedly holding anti-hemorrhagic properties. Interest within the medical field grew after accounts of his successful demonstrations were reported in ‘Philosophical Transactions’, a publication by the English Royal Society dating back to mid 1673. Denys claimed that his ‘essence’ was much simpler to use compared to earlier methods of cautery which involved the use of caustic agents such as the ‘needle and thread’ and ‘hot iron’. Denys’ ‘essence’, of which contents are unknown, however, believed to contain a mixture of potassium alum and sulfuric acid , would be applied to arterial and venous wounds in order to staunch the bleeding. Recognizing the effectiveness of the ‘essence’ and foreshadowing the potential usefulness in the English army, Denys received recognition by King Charles II and was invited to stay with him