ILLUSTRATIONS. 



I'LATE I. Negritos and United States Marines. 



II. Valley of the Aglao, showing large bowlders. 



III. The valley of the Aglao. Mount Pinatubo in the distance obscured by 



the haze. 



IV. Topography along the Aglao River, Zambales Mountain. The formation 



is igneous. 

 V. Character of material on slopes of Mount Pinatubo at 1,370 meters' 

 altitude. 

 VI. Looking west over the Aglao Valley from 1,520 meters' elevation on 

 Mount Pinatubo. 

 VII. Map of route Paumatawan-Mount Pinatubo. 



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