![](http://www.alamy.com/thumbs/6/BB3284B7-778B-4CCF-B00B-C9AD76E03D89/2A2523X.jpg)
Philadelphia Harbor showing the islands now being removed by the United States. Major C. W. Raymond, Corps of Engineers, Army, in charge, 1891;
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Photo credit: © Alpha Stock / Alamy / Afripics
License: Licensed
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