Working on a renovation project of a Thomas Church garden in San Francisco I was inclined to do a little research before I proceeded. So, I turned to our friends over at the Cultural Landscape Foundation. They directed me to the Environmental Design Archives at UC Berkeley where the Thomas D. Church archive is held. I also found a wealth of records from some of the Masters in Landscape Architecture including Garrett Eckbo and Robert R. Royston. This is a resource worth a look.