The Proposed Lodge to be located at Birch Lake, circa 1949, page 69 of the pdf.
Camp Mather 1949 Plan
This 1949 vintage report is a great reading full of ideas (some perhaps good, some perhaps bad) that were never implemented. This snapshot of mid-century optimism shows how much Camp Mather was valued, the high hopes for its future, and the plans the SF Rec Commission hoped to bring to fruition.