http://www.msc.edu.ph/centennial/philam-documents.html

This is the premiere site for important documents relevant to the Philippine-American War. Full texts to treaties such as the Protocol of Peace (1898), the Treaty of Paris, and the Bates Treaty and of proclamations and manifestos such as Agoncillo's protest against the Treaty of Paris, McKinley's Benevolent Assimilation Proclamation, Gen. Otis' claim of sovereignty proclamation, Gen. Aguinaldo's protest to the previous, the U.S. offer of autonomy, Paterno's proclamation of war, Aguinaldo's proclamation of surrender, and Pres. Roosevelt's proclamation ending the "insurrection".

http://www.msc.edu.ph/centennial/proc-capitulation.html

Full text of the capitulation or surrender of Manila by Spanish authorities to the Americans (14 Aug 1898).

http://www.msc.edu.ph/centennial/proc-occupation.html

Full text of the proclamation of occupation of Manila by Gen. Wesley Merritt (14 Aug 1898).

http://www.msc.edu.ph/centennial/filam1.html

Scroll near the middle (or search for "grayson") for the eyewitness account of Priv. William Grayson of that fateful night of 4 Feb 1899.

http://tornandfrayed.typepad.com/tornandfrayed/2006/09/death_of_gregor.html
This page contains the (short) full text of the famous entry in Gen. Gregorio del Pilar's diary. Scroll to the middle to find Richard Henry Little's tribute to del Pilar. Nearer the bottom of the page (in the comments section) you can see a quote from Adjutant Telesoforo Carrasco's eyewitness account of what happened after del Pilar's death.

http://www.bakbakan.com/junglep/jp-1.html

Search for "Richard Henry Little" to find the full text of the account of the discovery of the body of Gen. Gregorio del Pilar. This is slightly different from what is quoted in Torn and Frayed above. If you cannot access the main site, use the Internet Archive: http://web.archive.org/web/20020104123637/www.bakbakan.com/junglep/jp-1.html

http://tinyurl.com/3dwobz

Still another version of the same account by Richard Henry Little. From Google Books.

http://tinyurl.com/2j2qf5

Newspaper account of the Battle of Tirad Pass, published June 4, 1900. Gen. del Pilar here is mistaken for Gen. Aguinaldo. From the New York Times archive.

http://en.wikipedia.org/wiki/Lodge_Committee

English Wikipedia article on the Lodge Committee, which investigated alleged war crimes of American soldiers during the Philippine-American War. The article is heavily referenced to Wikisource.

http://name.umdl.umich.edu/AFJ2305.0001.001
Online copy of Schoolbooks and Krags; the United States Army in the Philippines, 1898-1902 by John Morgan Gates.