96

showing the location & afterwards ??? for giving the altitude of the ground only???
The Coast Survey tracing showed the 70' course as the highest one at the point, & I overlooked the report of the Colonel entirely (& my clerk did not seem to know anything about it.) When you called my attention to the discrepancy I carefully examined the C.S. Map again & also the sketches on page 132 C. Pilot of Oregon & concluded I was about right. Afterwards while down there I measured it with a tape & found it about 70' above high tide, from which I assume that there could not have been an error of one curve in the tracing: even one curve would only make it 90'. I estimated that there was a covering of 15' of earth over the rocks, of course this was a rough guess made

363

showing the location & afterwards ??? for giving the altitude of the ground only???
The Coast Survey tracing showed the 70' course as the highest one at the point, & I overlooked the report of the Colonel entirely (& my clerk did not seem to know anything about it.) Where you called my attention to the discrepancy I carefully examined the C.S. Map again & also the sketches on page 132 C. Pilot of Oregon & concluded I was about right. Afterwards while down there I measured it with a tape & found it about 70' above high tide, from which I assume that there could not have been an error of one curve in the tracing: even one curve would only make it 90'. I estimated that there was a covering of 15' of earth over the rocks, of course this was a rough ??? made

363