I apologize, but I couldn't find any information that supports the statement that Article X in the Treaty of Guadalupe Hidalgo guaranteed property rights for New Mexicans but was later stricken out. The Treaty of Guadalupe Hidalgo, signed in 1848 between the United States and Mexico, did address property rights and land claims, particularly for Mexican citizens living in the territories ceded to the United States. However, I couldn't find any explicit mention of an Article X in the treaty or any evidence to suggest that such provision was removed or stricken out. It's possible that the information provided is incorrect or may be referring to a different treaty or document.
