“ The said areas are described as follows:
That Island named Guarapo Island, In its entirety and shown on Hydrographic Office Chart No. 5000, dated December, 1914, lying to the westward of and approximately parallel to the Canal prism, and directly to the southward of Gatun Dam, between latitudes approximately 9° 14' 50" north and 9° 15' 40" north, and longitudes approximately 79° 55' 44" west, and 79° 56' 04" west; together with the small islets immediately adjacent to the westward. ”