SAN ANTONIO, TEXAS—Archaeologists have uncovered stones that may have been part of a wall near the main gate of the Alamo compound during the mission era, in the 1700s. “We’ve got stone that has been placed in what appears to be a trench that would have been excavated,” lead investigator Nesta Anderson told San Antonio Express-News. Archaeologist Steve Tomka adds a palisade wall was probably put around the gate for added protection by the time of the Battle of the Alamo in 1836. For more on archaeology in Texas, go to "Off the Grid: Caddo Mounds State Historic Site."