The last inscription from Spanish colonial times is by Andres Romero. He wrote "Andres Romero passed through here in the year 1774." "After his visit, turbulent times were seen by the Spanish. Mexico gained independence from Spain in 1821. Then, following the U.S.-Mexican War from 1846-1848, the Treaty Of Guadalupe Hidalgo ceded large areas of land from Mexico to the United States. This new land, the New Mexican Territory, opened the way for the Americans-the last of the inscribers-to come through El Morrro."