I should have opted for Spanish instead of Computer back in college. This article seems interesting if only i can understand it. It's from guardiacivil.org and about the Siege of Baler. Check out the images, one is a painting of Baler during the time and another has an old picture of the church.
Try translating the article by going to babelfish. Then copy the address of the website in the translate a website box and choose Spanish to English. The result is not quite English but it is understandable.