578 



ANNUAL REPORT SMITHSONIAN INSTITUTION, 193 



to the rock-hewn chamber at Thebes which was to be his tomb. From 

 Egypt, too, comes the first record of a subaqueous tunnel — construct- 



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ed under the dry bed of the river Euphrates, which had been tem- 

 porarily diverted from its channel. It was 12 feet wide, 15 feet high, 

 and was lined with brick masonry. 



