Where can I obtain the original text of all treaties regarding the cession of "Eastern Samoa" to the USA?

Historical details: (1) By the Treaty of Berlin of 1899, the United Kingdom and Germany renounced in favor of the United States all their rights and claims over the eastern islands of Samoa. This treaty went into effect on February 16, 1900. (2) On April 17, 1900, the matai (chiefs) of Tutuila formally ceded the islands of Tutuila and Aunu'u to the United States. (3) On July 16, 1904, the king and matai of Manu'a ceded the islands of Ta'u, Ofu, Olosega, and Rose Atoll to the United States. (4) Congress formally ratified the 1900 and 1904 deeds of cession retroactively in 1929. (5) Swains Island became part of American Samoa by joint resolution of Congress in 1925. ( Source: http://www.doi.gov/oia/Islandpages/asgpage.htm )

The above appears to list five sets of legal documents regarding the cession of "Eastern Samoa" to the USA. As we know, this area is now known as American Samoa.

Does anyone know where I can find the full text of some or all of these legal documents online?