The Campaign in Havana 245 



covered, but all the other rooms were fumigated 

 immediately, together with aU places visited by 

 him within a week before the onset of the disease 

 and during three days following. Wherever he 

 might possibly have been bitten, fumigation was 

 ordered to destroy the mosquitoes which had 

 infected him, or might have become infected by 

 biting him. It was found important to investi- 

 gate his history very thoroughly, and to verify 

 and check all obtainable information. Some- 

 times the history proved inexact, and certain foci 

 of the infected mosquitoes were left undestroyed. 

 It may also be true that walking cases of yellow 

 fever occurred, which would account for so-called 

 sporadic outbreaks of yellow fever. As the cam- 

 paign progressed, and the mosquitoes were slowly 

 but surely reduced in number, these instances 

 became of less importance. 



The storehouse for all materials and apparatus 

 necessary for fumigation operations on a large 

 scale was established near the stables where the 

 wagons and ambulances of the sanitary depart- 

 ment were kept. The ftmiigation brigades, each 

 consisting of a foreman and ten men, reported every 

 morning for duty at the storehouse. In addition, 

 each foreman knew where to find his men at any 

 hour in case of emergencies, either during or after 



