Considering the injustice to which Pearson had been subjected, and the provocation he had received, it is impossible to refrain from admiration of the serene and impartial temper in which he composed his _Examination_. Had he sat as judge between Jenner and himself, he could not have stated the case with greater accuracy and absence of bias. He fell into no exaggeration; he indulged in no sarcasm; he descended to no abuse. He set forth the incidents of the New Inoculation with the imperial simplicity and dignity of truth. Where others had gone crazed, he preserved some degree of sanity. He held it to be premature to proclaim the extinction of Smallpox, or to say with Jenner that reports of failure and injury from inoculated Cowpox were beneath contempt. It was only time and experience that could warrant such absolute assertion and prediction. It is said that in hurricanes of panic or enthusiasm, wise men go home and keep quiet until the sky clears, resistance being folly. For immediate effect resistance may be folly, but the protest of truth is sometimes imperative, whatever the disposition of the mob. Pearson took little at the time by his _Examination_: it entered into far too many details for general apprehension; and it was convenient to account for his opposition as due to jealousy and envy. Jenner attempted no reply, and assumed profound disdain. His silence was judicious, but it was not from disdain. * * * * * At this day it is easy to see that Pearson as against Jenner played his part badly, failing to recognise his proper advantage. Jenner’s prescription in the _Inquiry_ of 1798 was not Cowpox. It was Horsegrease Cowpox. It was a disease of the horse inoculated on the cow. Cowpox _per se_ he expressly rejected as useless, having no specific effect on the human constitution. Pearson and Woodville entertained Jenner’s prescription in good faith. They tried to generate pox on the cow with grease from the horse, but did not succeed. Reluctantly they abandoned Jenner’s prescription, and resorted to Cowpox. Whilst Pearson and Woodville were without prejudice against Horsegrease Cowpox, it was otherwise with the public. The origin of Cowpox in Horsegrease was voted detestable, and had the origin been maintained, it is not improbable that the New Inoculation would have proved abortive. This difficulty Pearson and Woodville, the chief promoters of the New Inoculation, cleared away. They had tried Horsegrease; they considered they had disproved Jenner’s assertion concerning it; and they were able to assure the public that they inoculated with Cowpox, and nothing but Cowpox, and had no connection with Horsegrease whatever. The public were satisfied; and Inoculation with Cowpox became the rage, fashionable and philanthropic.