The use of cranial suture closure as an indicator of age has been pervasive in anthropological literature for over 100 years. One foundational study was conducted by T.W. Todd and D.W. Lyon, who used male crania from the Hamann-Todd collection to develop a standard for estimating age based on a scoring system for cranial sutures. This study tests the Todd and Lyon method1 by applying it to a population of "White" female crania from the Hamann-Todd Osteological collection. This study will also develop a standard based on the female cranial data and compare the performance of a female-based standard to Todd and Lyon's male based standard. Overall, this study will serve as a test of the Todd and Lyon method and standard, as well as call into question the general correlation between suture closure and age.