US Post Office Department records assert that this was spelled Mount Tirzah until 1826, when the "h" was finally dropped. The US Post Office Department records also assert that Mount Tirzah was once the County Seat of Person County, but this same agency also asserted that Roxborough was the County Seat at the same exact point in time. So much for the early Post Office Department. There is no records yet found showing that Mount Tirzah was ever the County Seat.

Lieutenant Colonel Stephen Moore (fondly bestowed the title of General) was a Revolutionary War hero of note, commanding troops in Person County. The story is told of his riding to the top of a hill, admiring the beauty of the view, and vowing to return to his "Lost Eden" after the war. In 1793, he purchased property in the southern part of the county and named it Mt. Tirzah (Mount Beautiful) or "General Moore's Mountain." The old home is still located at its original site and owned by a descendant. The front porch overlooks the same inspiring view. Moore was buried on a nearby hill.

By 1795, a small community began to flourish around "General Moore's Mountain" such that the US Post Office Department granted Mount Tirzah its first and only Post Office on July 1, 1795, and it remained in operation until Mary 14, 1906, when it was finally closed down. The first Postmaster at Mount Tirzah was Charles Moore, probably the son of the founder.