David S. Castle, worked for several different telephone companies, helping design and build for them. Those companies included: Chicago Telephone & Telegraph, Missouri & Kansas Telephone, Texas Comp (Texaco), and the architectural firm M.L. Waller. The Waller Company is what brought him to Abilene. He finally wanted to settle down and chose to stay in Abilene and establish his own firm after a few years with the Waller Company. He helped design several Abilene downtown building and various county courthouses.
You can learn more about him at this website: <www.254texascourthouses.net/david-s-castle-architect.html>
Now for the puzzle, you will be doing some adding and multiplying.
First, add up the addresses for the O'Kelley Office Supply, Mims Building, Hotel Wooten, and the Paramount Theatre.
Second, find out how old David S Castle was when he died and multiply that with the answer from the first step.
Now, go put the answer from step 2 into the certitude checker below to see if you got the right answer. If you got the correct answer, you will be given the coordinates to the actual geocache.
You can validate your puzzle solution with certitude.