Historic Preservation Mystery Cache

The cache is not located at the posted coordinates. You will need to solve the puzzle below to determine where the cache is hiding.

The container is a custom made micro and a TOTT may be required to retrieve the log (no sign, no find!). Please do not post spoiler photos of the actual cache container in your log. 

• Vallejo Flour Mill
• Croll Building
• Alameda Terminal of the First Transcontinental Railroad
• Church of St. James the Apostle
• Mission San Jose
• Joaquin Miller Home
• Cresta Blanca Winery
• Site of First County Courthouse
• Site of Shell Mound
• Francisco Solano Alviso Adobe

You can validate your puzzle solution with certitude.