(100 Yards North) Used as a landmark in the 19th century by surveyors sighting from Duffy's Peak, located ten miles northeast. Jasper Hays, earliest recorded surveyor of this area, used the peaks during 1877-78 for charting the Llano Ranch, later bought by C. W. Post, the cereal king. Hays established, in addition, lines from which section surveys were made. Civil engineer A. L. Marhoff, using the original field notes and book of Hays, surveyed the land bought by Post, 1906. This included the section on which the town of Post was founded, 1907, as well as other property. 1970