Oliver Wendell Holmes, Jr., Tiglao v. Insular Government of Philippine Islands…
“ Of course, this does not mean that the titulo must have been effective in the particular case, for then prescription would be unnecessary. We assume, for instance, that if a private person in possession of Crown lands, seeming to be the owner, executed a formally valid conveyance under which his grantee held, supposing his title good, possession for ten years might create an indisputable right. ”
