Warning: The originals photos, texts, films, music, etc ... of the period previous to 1921 year - see the Act of the US Congress about it - have no copyright and belong to the public domain. However, those same pictures, I process this blog, when I restore and paint the pictures, then the right of modification is produced, ie that are protected by full copyright law, in this case mine. Of course there are many more laws in the world, declared in the public domain photographs (which is the topic at hand), in very later dates to the aforementioned (Example: WWII, Korea, etc ...).