Tower Island Comparisons
Upper Left: Admiralty Chart L949, No. 5 (1837)
Upper Right: Admiralty Chart 1375 (1841)
Left: Giffen Chart in Slevin's Log of the “Academy” (1931)
Note soundings on Giffen chart match those on others.
Upper Left: Admiralty Chart L949, No. 5 (1837)
Upper Right: Admiralty Chart 1375 (1841)
Left: Giffen Chart in Slevin's Log of the “Academy” (1931)
Note soundings on Giffen chart match those on others.