Begun in February, 1901, this work in Havana was so vigorously and skilfully prosecuted that before summer every case of yellow fever had disappeared from that city and its environs. During the summer a few cases occurred, but the last of them was disposed of early in September. That was the last case of yellow fever to originate in a city which for a century and a half had annually been scourged by that disease. Since that date the only cases that have been known there have been a few which were imported from less sanitary ports--at one time Havana had to establish a fever quarantine against United States ports! Thus the island which had long suffered reproach as the especial home of one of the deadliest of diseases, as a veritable plague-spot, which American life insurance companies forbade their policy holders to visit, became noted for its freedom from that scourge and for its general salubrity. A similar campaign was also conducted against another variety of mosquito which, by a like series of experiments, had been proved to be the propagating medium of so-called malarial fevers; with highly gratifying results. Among the important reforms effected by General Wood was that of the entire system of law and justice. It began with the penal institutions. When the Americans assumed control, they found the old Spanish prison system still in existence. Most of the prisons were antiquated, unsanitary and inhuman structures, to enter which was ominous for the body, the mind and the soul. There was no segregation of prisoners according to age or degree of criminality. Mere boys, sentenced for some slight misdemeanor, were herded in with adult felons of the most hardened and incorrigible type. Many had been confined for months, even years, awaiting trial. They had been arrested, locked up in default of bail, and then practically forgotten. Of these many were innocent of any wrong-doing; while some of those who were probably guilty were kept in confinement awaiting trial for a much longer term than they could have been sentenced for under the law if they had been tried and found guilty.