Plate 4A. Mouth of the Wailuku River at Hilo, showing the advance of one of the later waves 
into the river mouth. Photo taken near the trough between two waves, showing very low water, and 
the waves starting up the river as the next crest approaches. The steel span from the distant railroad 
bridge is visible in the middle distance. Photo by Francis Lyman. 
Plate 4B. A minute or so later, the waves are sweeping turbulently up the river. Photo by Francis 
Lyman. 
