The conditions that produce mosquitoes seem to be the same as the conditions that produce malaria, and, in any case, it is these that must be attacked, no matter whether Lady Anopheles be proved innocent or in any measure guilty. The mysteries that surround the subject, the occasional outbursts of disease when areas have been drained, the usual method of improvement, the occasional betterment of health when the reverse process of flooding has taken place, may possibly be explained by the law of subsoil water. Dr. Charles Creighton writes in his _History of Epidemics in Britain_ (p. 278): “According to that law, the dangerous products of fermentation arise from the soil when the pores of the ground are either getting filled with water after having been long filled with air, or are getting filled with air after having been long filled with water. It is the range of the fluctuation in the ground-water, either downwards or upwards, that determines the risk to health.” However, far be it from me to descant upon the mysterious causes of malaria. My object is only to try to prove the unwisdom of rivetting attention upon the anopheline mosquito. Deductions as to her innocence may be drawn from the accusations endeavoring to prove her guilty. We are told how noticeable among troops the difference in fever rate has been between those that slept on shore and those that remained on board ship in malarious districts. But as the mosquito is free to come aboard too, how does that statement tell against her? I remember a host of such insect invaders on the _Sydney_, the French mail boat, when anchored at feverish Saigon. We carried a shipload away with us, and when out at sea they feasted on me to such an extent that I arrived at Singapore looking as though stricken with a rash, but otherwise none the worse for their greediness.