Charts—. Illana Bay, Eastern part of, Mindanao, southwest coast, P. I., including Polloc Harbor and mouth of Mindanao River, [from] surveys in 1905-06, and other authorities, scale 1:100,000; with insets, Polloc Harbor, from survey by U. S. Navy in 1902, with additions from recent survey work, scale 1:40,000; Mindanao River, anchorage and Cotabato Entrance, from survey work in 1906 and from survey of U. S. Navy 1903-04, scale 1:40,000; chart 4619.

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